99221012 has 12 divisors (see below), whose sum is σ = 189422016. Its totient is φ = 45100440.

The previous prime is 99220999. The next prime is 99221029. The reversal of 99221012 is 21012299.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127468 + ... + 1127555.

It is an arithmetic number, because the mean of its divisors is an integer number (15785168).

Almost surely, 2^99221012 is an apocalyptic number.

It is an amenable number.

99221012 is a deficient number, since it is larger than the sum of its proper divisors (90201004).

99221012 is a wasteful number, since it uses less digits than its factorization.

99221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255038 (or 2255036 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 99221012 is about 9960.9744503236. The cubic root of 99221012 is about 462.9504928352.

The spelling of 99221012 in words is "ninety-nine million, two hundred twenty-one thousand, twelve".