Fatto matematico: 4801 is a number n for which n^{2}+1 is 6 times another square.
Trivia: 4801 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: February 21st is the day in 1245 that Thomas, the first known Bishop of Finland, is granted resignation after confessing to torture and forgery.