231233321220 has 96 divisors (see below), whose sum is σ = 706664891520. Its totient is φ = 56028610560.

The previous prime is 231233321197. The next prime is 231233321227. The reversal of 231233321220 is 22123332132.

231233321220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231233321227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1252804 + ... + 1425476.

It is an arithmetic number, because the mean of its divisors is an integer number (7361092620).

Almost surely, 2^231233321220 is an apocalyptic number.

231233321220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231233321220 is an abundant number, since it is smaller than the sum of its proper divisors (475431570300).

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

231233321220 is a wasteful number, since it uses less digits than its factorization.

231233321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174725 (or 174723 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 231233321220 its reverse (22123332132), we get a palindrome (253356653352).

The spelling of 231233321220 in words is "two hundred thirty-one billion, two hundred thirty-three million, three hundred twenty-one thousand, two hundred twenty".