-illion
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The suffix -illion is used to identify large numbers, such as million.
There are some mock numbers with this suffix, such as zillion and many others.
[edit] Short scale
In the English language, Brazil, Puerto Rico, Russia, Turkey and Greece, the most common system for -illion is called the short scale. In this scale, the suffix is added to a Latin-derived numerical prefix meaning n to indicate 10(3n+3). For example, a quadrillion is 10(3×4+3), or 10(12+3), or 1015.
[edit] Long scale
In the remainder of the world, the long scale system is prevalent. In this, the -illion suffix is added to the Latin prefix meaning n to indicate 10(6n). Numbers of the form 10(6n+3) can still be read as the word "thousand" in the respective language followed by n-illion.