231011111100 has 144 divisors (see below), whose sum is σ = 833320164096. Its totient is φ = 48002304000.

The previous prime is 231011111069. The next prime is 231011111101. The reversal of 231011111100 is 1111110132.

It is a super-2 number, since 2×231011111100² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231011111101) 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, 4977141 + ... + 5023340.

It is an arithmetic number, because the mean of its divisors is an integer number (5786945584).

Almost surely, 2^231011111100 is an apocalyptic number.

231011111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231011111100 is an abundant number, since it is smaller than the sum of its proper divisors (602309052996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231011111100 is a wasteful number, since it uses less digits than its factorization.

231011111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000516 (or 10000509 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 231011111100 its reverse (1111110132), we get a palindrome (232122221232).

The spelling of 231011111100 in words is "two hundred thirty-one billion, eleven million, one hundred eleven thousand, one hundred".