231202321020 has 72 divisors (see below), whose sum is σ = 765069505200. Its totient is φ = 56049047040.

The previous prime is 231202321003. The next prime is 231202321073. The reversal of 231202321020 is 20123202132.

231202321020 is a `hidden beast` number, since 231 + 202 + 3 + 210 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231202320984 and 231202321002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58382445 + ... + 58386404.

It is an arithmetic number, because the mean of its divisors is an integer number (10625965350).

Almost surely, 2^231202321020 is an apocalyptic number.

231202321020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231202321020 is an abundant number, since it is smaller than the sum of its proper divisors (533867184180).

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

231202321020 is a wasteful number, since it uses less digits than its factorization.

231202321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116768875 (or 116768870 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 231202321020 its reverse (20123202132), we get a palindrome (251325523152).

The spelling of 231202321020 in words is "two hundred thirty-one billion, two hundred two million, three hundred twenty-one thousand, twenty".