113121113031 has 20 divisors (see below), whose sum is σ = 168992895984. Its totient is φ = 75409833600.

The previous prime is 113121112981. The next prime is 113121113033. The reversal of 113121113031 is 130311121311.

It is not a de Polignac number, because 113121113031 - 2⁹ = 113121112519 is a prime.

It is a super-2 number, since 2×113121113031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 113121112995 and 113121113013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113121113033) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2176791 + ... + 2228151.

Almost surely, 2^113121113031 is an apocalyptic number.

113121113031 is a deficient number, since it is larger than the sum of its proper divisors (55871782953).

113121113031 is an equidigital number, since it uses as much as digits as its factorization.

113121113031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78564 (or 78555 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 113121113031 its reverse (130311121311), we get a palindrome (243432234342).

The spelling of 113121113031 in words is "one hundred thirteen billion, one hundred twenty-one million, one hundred thirteen thousand, thirty-one".