99923011123121 has 16 divisors (see below), whose sum is σ = 107785178884800. Its totient is φ = 92286988474368.

The previous prime is 99923011123069. The next prime is 99923011123123. The reversal of 99923011123121 is 12132111032999.

It is a cyclic number.

It is not a de Polignac number, because 99923011123121 - 2⁴² = 95524964612017 is a prime.

It is a super-2 number, since 2×99923011123121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99923011123123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87911456 + ... + 89040833.

It is an arithmetic number, because the mean of its divisors is an integer number (6736573680300).

Almost surely, 2^{99923011123121} is an apocalyptic number.

It is an amenable number.

99923011123121 is a deficient number, since it is larger than the sum of its proper divisors (7862167761679).

99923011123121 is a wasteful number, since it uses less digits than its factorization.

99923011123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176952928.

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 99923011123121 in words is "ninety-nine trillion, nine hundred twenty-three billion, eleven million, one hundred twenty-three thousand, one hundred twenty-one".