This article is about the short scale trillion. For details about differing meanings of the word, see long and short scales.

1,000,000,000,000 is the number that comes after 999,999,999,999 and before 1,000,000,000,001. In the short scale, this number is a trillion. In the long scale, this number is referred to as a billion. The prefix for this number is tera.

Selected 13-digit numbers

• 1111111111111 - Rep digit
• 1307674368000 - factorial of 15
• 1548008755920 - Fibonacci number
• 2222222222222 - Rep digit
• 2504730781961 - Fibonacci number
• 3333333333333 - Rep digit
• 4052739537881 - Fibonacci number
• 4444444444444 - Rep digit
• 5555555555555 - Rep digit
• 6557470319842 - Fibonacci number
• 6666666666666 - Rep digit
• 7777777777777 - Rep digit
• 8888888888888 - Rep digit
• 9999999999999 - Rep digit

Trillion in science and mathematics

• BioMed - Bacteria on the human body: the surface of the human body houses roughly one trillion bacteria ^*
• Mathematics: 1.1 * One trillion - The approximate number of known non-trivial zeros of Riemann zeta function as of August 2005 ^*
• BioMed - Cells in the human body: the human body consists of roughly one hundred trillion cells
• Mathematics - Known digits of pi: As of 2002, the number of known digits of pi was 1 241 100 000 000

See also

• List of numbers
• Names of large numbers
• SI prefixes

Integers | Large numbers