Trillion may mean:
Either of the following two numbers (see Names for large numbers for more information):
- 1,000,000,000,000 (one million million; ; SI prefix: tera-) – for all short scale countries – now used in most English language countries.
- 1,000,000,000,000,000,000 (one million million million; ; SI prefix: exa-) – for all long scale countries – not used much in English language countries but often used in many other languages.
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