99121553315 has 16 divisors (see below), whose sum is σ = 119156659200. Its totient is φ = 79156809312.

The previous prime is 99121553309. The next prime is 99121553339. The reversal of 99121553315 is 51335512199.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 99121553315 - 2²⁰ = 99120504739 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12326066 + ... + 12334104.

It is an arithmetic number, because the mean of its divisors is an integer number (7447291200).

Almost surely, 2^99121553315 is an apocalyptic number.

99121553315 is a deficient number, since it is larger than the sum of its proper divisors (20035105885).

99121553315 is a wasteful number, since it uses less digits than its factorization.

99121553315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12106.

The product of its digits is 182250, while the sum is 44.

The spelling of 99121553315 in words is "ninety-nine billion, one hundred twenty-one million, five hundred fifty-three thousand, three hundred fifteen".