23131111112 has 16 divisors (see below), whose sum is σ = 43373182860. Its totient is φ = 11564929024.

The previous prime is 23131111103. The next prime is 23131111121. The reversal of 23131111112 is 21111113132.

It is an interprime number because it is at equal distance from previous prime (23131111103) and next prime (23131111121).

It can be written as a sum of positive squares in 2 ways, for example, as 22306617316 + 824493796 = 149354^2 + 28714^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103388 + ... + 238644.

Almost surely, 2^23131111112 is an apocalyptic number.

It is an amenable number.

23131111112 is a deficient number, since it is larger than the sum of its proper divisors (20242071748).

23131111112 is a wasteful number, since it uses less digits than its factorization.

23131111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156640 (or 156636 counting only the distinct ones).

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

Adding to 23131111112 its reverse (21111113132), we get a palindrome (44242224244).

The spelling of 23131111112 in words is "twenty-three billion, one hundred thirty-one million, one hundred eleven thousand, one hundred twelve".