99021511228 has 6 divisors (see below), whose sum is σ = 173287644656. Its totient is φ = 49510755612.

The previous prime is 99021511189. The next prime is 99021511279. The reversal of 99021511228 is 82211512099.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12377688900 + ... + 12377688907.

Almost surely, 2^99021511228 is an apocalyptic number.

It is an amenable number.

99021511228 is a deficient number, since it is larger than the sum of its proper divisors (74266133428).

99021511228 is a wasteful number, since it uses less digits than its factorization.

99021511228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24755377811 (or 24755377809 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 40.

The spelling of 99021511228 in words is "ninety-nine billion, twenty-one million, five hundred eleven thousand, two hundred twenty-eight".