231111322113 has 16 divisors (see below), whose sum is σ = 361687733120. Its totient is φ = 128494325376.

The previous prime is 231111322111. The next prime is 231111322129. The reversal of 231111322113 is 311223111132.

It is not a de Polignac number, because 231111322113 - 2¹ = 231111322111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 231111322113.

It is not an unprimeable number, because it can be changed into a prime (231111322111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148719508 + ... + 148721061.

It is an arithmetic number, because the mean of its divisors is an integer number (22605483320).

Almost surely, 2^231111322113 is an apocalyptic number.

It is an amenable number.

231111322113 is a deficient number, since it is larger than the sum of its proper divisors (130576411007).

231111322113 is a wasteful number, since it uses less digits than its factorization.

231111322113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297440616.

The product of its digits is 216, while the sum is 21.

Adding to 231111322113 its reverse (311223111132), we get a palindrome (542334433245).

The spelling of 231111322113 in words is "two hundred thirty-one billion, one hundred eleven million, three hundred twenty-two thousand, one hundred thirteen".