quintillion vs large integer

quintillion and large integer both are nouns.

Word	Noun	Adjective	Verb	Adverb
quintillion	Yes	No	No	No
large integer	Yes	No	No	No

As nouns, large integer is a hypernym of quintillion; that is, large integer is a word with a broader meaning than quintillion:

quintillion: the number that is represented as a one followed by 18 zeros in the US
large integer: an integer equal to or greater than ten

quintillion (noun)	large integer (noun)
the number that is represented as a one followed by 18 zeros in the US	an integer equal to or greater than ten