231332110220 has 12 divisors (see below), whose sum is σ = 485797431504. Its totient is φ = 92532844080.

The previous prime is 231332110147. The next prime is 231332110249. The reversal of 231332110220 is 22011233132.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 11566605511 = 231332110220 / (2 + 3 + 1 + 3 + 3 + 2 + 1 + 1 + 0 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 231332110192 and 231332110201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5783302736 + ... + 5783302775.

It is an arithmetic number, because the mean of its divisors is an integer number (40483119292).

Almost surely, 2^231332110220 is an apocalyptic number.

231332110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231332110220 is an abundant number, since it is smaller than the sum of its proper divisors (254465321284).

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

231332110220 is a wasteful number, since it uses less digits than its factorization.

231332110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11566605520 (or 11566605518 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 231332110220 its reverse (22011233132), we get a palindrome (253343343352).

The spelling of 231332110220 in words is "two hundred thirty-one billion, three hundred thirty-two million, one hundred ten thousand, two hundred twenty".