Quintilllion n. : According to the French notation, which is used on the Continent and in America, the cube of a million, or a unit with eighteen ciphers annexed; according to the English notation, a number produced by involving a million to the fifth power, or a unit with thirty ciphers annexed. See the Note under Numeration.

Example:


Taxonomy
large numbers, names of large numbers, googolplex, prefix, quadrillion, short scale, long scale, sextillion, quintillion, quattuordecillion, sexdecillion, octodecillion, vigintillion, Traditional British, standard dictionary, myriad, centillion, dictionaries.

Defination from the web:
... searches on French-language pages for trillion, quadrillion, and quintillion return 6630, 312, and 127 hits respectively, whilst searches for ... Thousand quintillion. Quintilliard. 11. 1036. Undecillion. Sextillion. Sextillion. 12. 1039. Duodecillion. Thousand sextillion ...