111921695231 has 2 divisors, whose sum is σ = 111921695232. Its totient is φ = 111921695230.

The previous prime is 111921695219. The next prime is 111921695239. The reversal of 111921695231 is 132596129111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111921695231 - 2²² = 111917500927 is a prime.

It is a super-2 number, since 2×111921695231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111921695239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55960847615 + 55960847616.

It is an arithmetic number, because the mean of its divisors is an integer number (55960847616).

Almost surely, 2^111921695231 is an apocalyptic number.

111921695231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111921695231 is an equidigital number, since it uses as much as digits as its factorization.

111921695231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 41.

The spelling of 111921695231 in words is "one hundred eleven billion, nine hundred twenty-one million, six hundred ninety-five thousand, two hundred thirty-one".