Hecho general: 99011 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 99011 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 99011 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: January 30th is the day in 1889 that Archduke Crown Prince Rudolf of Austria, heir to the Austro-Hungarian crown, is found dead with his mistress Baroness Mary Vetsera in Mayerling.