231030102131220 has 48 divisors (see below), whose sum is σ = 739296326821248. Its totient is φ = 52806880487040.

The previous prime is 231030102131099. The next prime is 231030102131221. The reversal of 231030102131220 is 22131201030132.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231030102131221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275035835451 + ... + 275035836290.

It is an arithmetic number, because the mean of its divisors is an integer number (15402006808776).

Almost surely, 2^{231030102131220} is an apocalyptic number.

231030102131220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231030102131220 is an abundant number, since it is smaller than the sum of its proper divisors (508266224690028).

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

231030102131220 is a wasteful number, since it uses less digits than its factorization.

231030102131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550071671760 (or 550071671758 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 231030102131220 its reverse (22131201030132), we get a palindrome (253161303161352).

The spelling of 231030102131220 in words is "two hundred thirty-one trillion, thirty billion, one hundred two million, one hundred thirty-one thousand, two hundred twenty".