Fatto generale: 1220 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1220 is the number of labeled mappings from 5 points to themselves with exactly 2 cycles.
Trivia: 1220 is an uninteresting number.
Data storica: May 4th is the day in 1871 that the National Association, the first professional baseball league, opens its first season in Fort Wayne, Indiana.