111100020001931 has 2 divisors, whose sum is σ = 111100020001932. Its totient is φ = 111100020001930.

The previous prime is 111100020001909. The next prime is 111100020002047. The reversal of 111100020001931 is 139100020001111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111100020001931 is a prime.

It is a super-2 number, since 2×111100020001931² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111100020004931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550010000965 + 55550010000966.

It is an arithmetic number, because the mean of its divisors is an integer number (55550010000966).

Almost surely, 2^{111100020001931} is an apocalyptic number.

111100020001931 is a deficient number, since it is larger than the sum of its proper divisors (1).

111100020001931 is an equidigital number, since it uses as much as digits as its factorization.

111100020001931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 20.

The spelling of 111100020001931 in words is "one hundred eleven trillion, one hundred billion, twenty million, one thousand, nine hundred thirty-one".