231231100133220 has 48 divisors (see below), whose sum is σ = 706305905863488. Its totient is φ = 56056024274560.

The previous prime is 231231100133197. The next prime is 231231100133279. The reversal of 231231100133220 is 22331001132132.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175175075199 + ... + 175175076518.

It is an arithmetic number, because the mean of its divisors is an integer number (14714706372156).

Almost surely, 2^{231231100133220} is an apocalyptic number.

231231100133220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231231100133220 is an abundant number, since it is smaller than the sum of its proper divisors (475074805730268).

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

231231100133220 is a wasteful number, since it uses less digits than its factorization.

231231100133220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350350151740 (or 350350151738 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 231231100133220 its reverse (22331001132132), we get a palindrome (253562101265352).

The spelling of 231231100133220 in words is "two hundred thirty-one trillion, two hundred thirty-one billion, one hundred million, one hundred thirty-three thousand, two hundred twenty".