111009901931 has 2 divisors, whose sum is σ = 111009901932. Its totient is φ = 111009901930.

The previous prime is 111009901921. The next prime is 111009901939. The reversal of 111009901931 is 139109900111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111009901931 - 2⁶ = 111009901867 is a prime.

It is a super-2 number, since 2×111009901931² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111009901891 and 111009901900.

It is not a weakly prime, because it can be changed into another prime (111009901939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55504950965 + 55504950966.

It is an arithmetic number, because the mean of its divisors is an integer number (55504950966).

Almost surely, 2^111009901931 is an apocalyptic number.

111009901931 is a deficient number, since it is larger than the sum of its proper divisors (1).

111009901931 is an equidigital number, since it uses as much as digits as its factorization.

111009901931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2187, while the sum is 35.

The spelling of 111009901931 in words is "one hundred eleven billion, nine million, nine hundred one thousand, nine hundred thirty-one".