231231102020 has 24 divisors (see below), whose sum is σ = 486385315584. Its totient is φ = 92340059616.

The previous prime is 231231101989. The next prime is 231231102083. The reversal of 231231102020 is 20201132132.

231231102020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 231231102020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9511382 + ... + 9535661.

It is an arithmetic number, because the mean of its divisors is an integer number (20266054816).

Almost surely, 2^231231102020 is an apocalyptic number.

231231102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231231102020 is an abundant number, since it is smaller than the sum of its proper divisors (255154213564).

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

231231102020 is a wasteful number, since it uses less digits than its factorization.

231231102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19047659 (or 19047657 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 231231102020 its reverse (20201132132), we get a palindrome (251432234152).

The spelling of 231231102020 in words is "two hundred thirty-one billion, two hundred thirty-one million, one hundred two thousand, twenty".