Fatto generale: 12210 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 12210 is an uninteresting number.
Trivia: 12210 is a boring number.
Data storica: June 5th is the day in 1989 that the Unknown Rebel halts the progress of a column of advancing tanks for over half an hour after the Tiananmen Square protests of 1989.