113213122031 has 4 divisors (see below), whose sum is σ = 113253688464. Its totient is φ = 113172555600.

The previous prime is 113213122007. The next prime is 113213122051. The reversal of 113213122031 is 130221312311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130221312311 = 149 ⋅873968539.

It is a cyclic number.

It is not a de Polignac number, because 113213122031 - 2³⁰ = 112139380207 is a prime.

It is a super-2 number, since 2×113213122031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113213121994 and 113213122012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113213122051) 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, 20279030 + ... + 20284611.

It is an arithmetic number, because the mean of its divisors is an integer number (28313422116).

Almost surely, 2^113213122031 is an apocalyptic number.

113213122031 is a deficient number, since it is larger than the sum of its proper divisors (40566433).

113213122031 is an equidigital number, since it uses as much as digits as its factorization.

113213122031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40566432.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 113213122031 its reverse (130221312311), we get a palindrome (243434434342).

The spelling of 113213122031 in words is "one hundred thirteen billion, two hundred thirteen million, one hundred twenty-two thousand, thirty-one".