# quadrillion

> English word · Numeral · IPA /kwɑˈdɹɪl.i.ən/ · frequency rank #84,641

## Definitions
1. A thousand trillion (logic: 1,000 × 1,000⁴): 1 followed by fifteen zeros, 10¹⁵.
2. A million trillion (logic: 1,000,000⁴): 1 followed by twenty-four zeros, 10²⁴.

## Etymology
From French quadrillion, from quadri- (“four”) + -illion. By surface analysis, quadr- + -illion.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/quadrillion