99120920855 has 32 divisors (see below), whose sum is σ = 130103366400. Its totient is φ = 71896550400.

The previous prime is 99120920837. The next prime is 99120920863. The reversal of 99120920855 is 55802902199.

It is not a de Polignac number, because 99120920855 - 2⁶ = 99120920791 is a prime.

It is a super-2 number, since 2×99120920855² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52471751 + ... + 52473639.

It is an arithmetic number, because the mean of its divisors is an integer number (4065730200).

Almost surely, 2^99120920855 is an apocalyptic number.

99120920855 is a deficient number, since it is larger than the sum of its proper divisors (30982445545).

99120920855 is a wasteful number, since it uses less digits than its factorization.

99120920855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935.

The product of its (nonzero) digits is 583200, while the sum is 50.

The spelling of 99120920855 in words is "ninety-nine billion, one hundred twenty million, nine hundred twenty thousand, eight hundred fifty-five".