pagination vs page number

pagination and page number both are nouns.

Word	Noun	Adjective	Verb	Adverb
pagination	Yes	No	No	No
page number	Yes	No	No	No

As nouns, pagination and page number are synonyms defined as:

Other synonyms of pagination include folio, paging.

pagination (noun)	page number (noun)
the system of numbering pages	the system of numbering pages