23131111311 has 48 divisors (see below), whose sum is σ = 42999810048. Its totient is φ = 11628532800.

The previous prime is 23131111307. The next prime is 23131111331. The reversal of 23131111311 is 11311113132.

23131111311 is a `hidden beast` number, since 2 + 31 + 311 + 11 + 311 = 666.

It is not a de Polignac number, because 23131111311 - 2² = 23131111307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131111331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 516876 + ... + 559841.

It is an arithmetic number, because the mean of its divisors is an integer number (895829376).

Almost surely, 2^23131111311 is an apocalyptic number.

23131111311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23131111311 is a deficient number, since it is larger than the sum of its proper divisors (19868698737).

23131111311 is a wasteful number, since it uses less digits than its factorization.

23131111311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076772 (or 1076769 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

Adding to 23131111311 its reverse (11311113132), we get a palindrome (34442224443).

It can be divided in two parts, 2 and 3131111311, that added together give a palindrome (3131111313).

The spelling of 23131111311 in words is "twenty-three billion, one hundred thirty-one million, one hundred eleven thousand, three hundred eleven".