two dozen vs large integer

two dozen and large integer both are nouns.

Word	Noun	Adjective	Verb	Adverb
two dozen	Yes	No	No	No
large integer	Yes	No	No	No

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

two dozen (noun)	large integer (noun)
the cardinal number that is the sum of twenty-three and one	an integer equal to or greater than ten