Trillionth
From Wikipedia, the free encyclopedia
 |
This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (May 2009) |
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.
[edit] Short scale countries
In most English-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 (pronounced "peeko"), and is abbreviated as lowercase p.
[edit] 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 notation. The prefix for a number of this magnitude is atto , and is abbreviated as lowercase a.
 |
This number article is a stub. You can help Wikipedia by expanding it. |
