Trillionth
Encyclopedia
One trillionth is the reciprocal
of a trillion, which means it has one of two definitions depending on whether the long scale
or short scale
numbering system is in use.
-speaking countries, a trillionth is equal to 0.000 000 000 001, or 1 x 10-12 in scientific notation
. The prefix for a number of this magnitude is pico
, and is abbreviated as lowercase p.
. The prefix for a number of this magnitude is atto , and is abbreviated as lowercase a.
Multiplicative inverse
In mathematics, a multiplicative inverse or reciprocal for a number x, denoted by 1/x or x−1, is a number which when multiplied by x yields the multiplicative identity, 1. The multiplicative inverse of a fraction a/b is b/a. For the multiplicative inverse of a real number, divide 1 by the...
of a trillion, which means it has one of two definitions depending on whether the long scale
Long and short scales
The long and short scales are two of several different large-number naming systems used throughout the world for integer powers of ten. Many countries, including most in continental Europe, use the long scale whereas most English-speaking countries use the short scale...
or short scale
Long and short scales
The long and short scales are two of several different large-number naming systems used throughout the world for integer powers of ten. Many countries, including most in continental Europe, use the long scale whereas most English-speaking countries use the short scale...
numbering system is in use.
Short scale countries
In most EnglishEnglish language
English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...
-speaking countries, a trillionth is equal to 0.000 000 000 001, or 1 x 10-12 in scientific notation
Scientific notation
Scientific notation is a way of writing numbers that are too large or too small to be conveniently written in standard decimal notation. Scientific notation has a number of useful properties and is commonly used in calculators and by scientists, mathematicians, doctors, and engineers.In scientific...
. The prefix for a number of this magnitude is pico
Pico
Pico- is a prefix in the metric system denoting a factor of 10−12 or .Derived from the Italian piccolo, meaning small, this was one of the original 12 prefixes defined in 1960 when the International System of Units was established....
, and is abbreviated as lowercase p.
Long scale countries
In most European countries, a trillionth is equal to 0.000 000 000 000 000 001, or 1 x 10-18 in scientific notationScientific notation
Scientific notation is a way of writing numbers that are too large or too small to be conveniently written in standard decimal notation. Scientific notation has a number of useful properties and is commonly used in calculators and by scientists, mathematicians, doctors, and engineers.In scientific...
. The prefix for a number of this magnitude is atto , and is abbreviated as lowercase a.