113021111231 has 4 divisors (see below), whose sum is σ = 129166984272. Its totient is φ = 96875238192.

The previous prime is 113021111201. The next prime is 113021111239. The reversal of 113021111231 is 132111120311.

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

It is a cyclic number.

It is not a de Polignac number, because 113021111231 - 2⁶ = 113021111167 is a prime.

It is a super-2 number, since 2×113021111231² (a number of 23 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 (113021111239) 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, 8072936510 + ... + 8072936523.

It is an arithmetic number, because the mean of its divisors is an integer number (32291746068).

Almost surely, 2^113021111231 is an apocalyptic number.

113021111231 is a deficient number, since it is larger than the sum of its proper divisors (16145873041).

113021111231 is an equidigital number, since it uses as much as digits as its factorization.

113021111231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16145873040.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 113021111231 its reverse (132111120311), we get a palindrome (245132231542).

The spelling of 113021111231 in words is "one hundred thirteen billion, twenty-one million, one hundred eleven thousand, two hundred thirty-one".