99021012 has 12 divisors (see below), whose sum is σ = 231049056. Its totient is φ = 33007000.

The previous prime is 99020981. The next prime is 99021017. The reversal of 99021012 is 21012099.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99021017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4125864 + ... + 4125887.

It is an arithmetic number, because the mean of its divisors is an integer number (19254088).

Almost surely, 2^99021012 is an apocalyptic number.

It is an amenable number.

99021012 is an abundant number, since it is smaller than the sum of its proper divisors (132028044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99021012 is a wasteful number, since it uses less digits than its factorization.

99021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8251758 (or 8251756 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 99021012 is about 9950.9302077745. The cubic root of 99021012 is about 462.6392268448.

The spelling of 99021012 in words is "ninety-nine million, twenty-one thousand, twelve".