23031131111 has 8 divisors (see below), whose sum is σ = 23700638304. Its totient is φ = 22364100000.

The previous prime is 23031131087. The next prime is 23031131117. The reversal of 23031131111 is 11113113032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23031131111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23031131111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23031131117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600140 + ... + 637361.

It is an arithmetic number, because the mean of its divisors is an integer number (2962579788).

Almost surely, 2^23031131111 is an apocalyptic number.

23031131111 is a deficient number, since it is larger than the sum of its proper divisors (669507193).

23031131111 is a wasteful number, since it uses less digits than its factorization.

23031131111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238041.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 23031131111 its reverse (11113113032), we get a palindrome (34144244143).

The spelling of 23031131111 in words is "twenty-three billion, thirty-one million, one hundred thirty-one thousand, one hundred eleven".