Fatto generale: 9099 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 9099 is the number of ways to 3-color the faces of a dodecahedron.
Trivia: 9099 is a boring number.
Data storica: November 28th is the day in 1971 that Fred Quilt, a leader of the Tsilhqot'in First Nation is severely beaten by Royal Canadian Mounted Police officers; he dies two days later.