en.wikipedia.org/wiki/Names_of_large_numbers

This article lists and discusses the usage and derivation of names of large numbers, together .... Some names of large numbers, such as million, billion, and trillion, have real .... Chuquet is sometimes credited with inventing the names million, billion, trillion, quadrillion, and so forth. This is ... That is, a million is a big thousand.

www.statman.info/conversions/number_scales.html

1,000,000,000,000,000,000,000, zetta, Z, Sextillion, Thousand Trillion/Trilliard ... Trillion. 1,000,000,000,000,000, peta, P, Quadrillion, Thousand Billion/Billiard.

www.thoughtco.com/zeros-in-million-billion-trillion-2312346

Mar 1, 2017 ... Numbers of Zeros in a Million, Billion, Trillion and More ... Ten thousand 10,000 ( 4 zeros) ... Quintillion 1,000,000,000,000,000,000 (18 zeros)

www.khanacademy.org/questions/what-comes-after-trillions/kafb_3431682

tens 10 hundreds 100 thousand 1,000 1 million 1,000,000 2 billion 1,000,000,000 3 trillion 1,000,000,000,000 4 quadrillion 1,000,000,000,000,000 5 quintillion ...

www.unc.edu/~rowlett/units/large.html

Thus billion and trillion are coined from the Latin prefixes bi- (n = 2) and tri- (n = 3 ), respectively. ... (The traditional names thousand and million are retained for n = 1 and 2 and the special name gillion, suggested by the SI prefix ... quadrillion ...

www.thealmightyguru.com/Pointless/BigNumbers.html

1, million, 6 (1,000,000). 2, billion, 9 (1,000,000,000). 3, trillion, 12 ... 4, quadrillion, 15 (1,000,000,000,000,000). 5, quintillion, 18 ( 1,000,000,000,000,000,000).

blog.oxforddictionaries.com/2014/12/psy-youtube-quintillion

Dec 9, 2014 ... (Although the British and American definitions of billion used to differ, it is now widely understood to mean 'a thousand million'.) Above that ...

2000clicks.com/graeme/LangNumbersMillionsAndBillionsAndZillions.htm

9, 1, 000, 000, 000, Billion, Thousand Million, or "Milliard". 12, 1, 000, 000, 000, 000, Trillion, Billion. 15, 1, 000, 000, 000, 000, 000, Quadrillion, Thousand Billion.

www.sciforums.com/threads/million-billion-trillion-then-what.10130

milliard = one thousand times one million. - billion = one million times one million. However, since ... quintillion = 10<sup>18</sup> hexillion ...

mathcentral.uregina.ca/qq/database/qq.09.95/blaine1.html

( to save some typing I am going to write 10^3 to mean 10x10x10=1 000, 10^4 = 10x10x10x10 = 10 000 and so on so a trillion is 10^12) quadrillion; 10^15