Fatto generale: 10621 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 10621 is a boring number.
Trivia: 10621 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: January 28th is the day in 98 that Trajan succeeded his adoptive father Nerva as Roman emperor; under his rule the Roman Empire would reach its maximum extent.