231213110020 has 24 divisors (see below), whose sum is σ = 501210355968. Its totient is φ = 89501848800.

The previous prime is 231213110003. The next prime is 231213110039. The reversal of 231213110020 is 20011312132.

It is a junction number, because it is equal to n+sod(n) for n = 231213109976 and 231213110003.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186461566 + ... + 186462805.

It is an arithmetic number, because the mean of its divisors is an integer number (20883764832).

Almost surely, 2^231213110020 is an apocalyptic number.

231213110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231213110020 is an abundant number, since it is smaller than the sum of its proper divisors (269997245948).

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

231213110020 is a wasteful number, since it uses less digits than its factorization.

231213110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372924411 (or 372924409 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 231213110020 its reverse (20011312132), we get a palindrome (251224422152).

The spelling of 231213110020 in words is "two hundred thirty-one billion, two hundred thirteen million, one hundred ten thousand, twenty".