231111220010100 has 72 divisors (see below), whose sum is σ = 668762396967168. Its totient is φ = 61622230060800.

The previous prime is 231111220009997. The next prime is 231111220010141. The reversal of 231111220010100 is 1010022111132.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 231111220010100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43935556 + ... + 48913755.

It is an arithmetic number, because the mean of its divisors is an integer number (9288366624544).

Almost surely, 2^{231111220010100} is an apocalyptic number.

231111220010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231111220010100 is an abundant number, since it is smaller than the sum of its proper divisors (437651176957068).

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

231111220010100 is a wasteful number, since it uses less digits than its factorization.

231111220010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92857625 (or 92857618 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 231111220010100 its reverse (1010022111132), we get a palindrome (232121242121232).

The spelling of 231111220010100 in words is "two hundred thirty-one trillion, one hundred eleven billion, two hundred twenty million, ten thousand, one hundred".