111009670021631 has 4 divisors (see below), whose sum is σ = 111010192183272. Its totient is φ = 111009147859992.

The previous prime is 111009670021571. The next prime is 111009670021643. The reversal of 111009670021631 is 136120076900111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111009670021631 is a prime.

It is a super-2 number, since 2×111009670021631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111009670021231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260761796 + ... + 261187161.

It is an arithmetic number, because the mean of its divisors is an integer number (27752548045818).

Almost surely, 2^{111009670021631} is an apocalyptic number.

111009670021631 is a deficient number, since it is larger than the sum of its proper divisors (522161641).

111009670021631 is an equidigital number, since it uses as much as digits as its factorization.

111009670021631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522161640.

The product of its (nonzero) digits is 13608, while the sum is 38.

The spelling of 111009670021631 in words is "one hundred eleven trillion, nine billion, six hundred seventy million, twenty-one thousand, six hundred thirty-one".