231322122220 has 48 divisors (see below), whose sum is σ = 587830340160. Its totient is φ = 74645121024.

The previous prime is 231322122167. The next prime is 231322122247. The reversal of 231322122220 is 22221223132.

It is a junction number, because it is equal to n+sod(n) for n = 231322122191 and 231322122200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48594705 + ... + 48599464.

It is an arithmetic number, because the mean of its divisors is an integer number (12246465420).

Almost surely, 2^231322122220 is an apocalyptic number.

231322122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231322122220 is an abundant number, since it is smaller than the sum of its proper divisors (356508217940).

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

231322122220 is a wasteful number, since it uses less digits than its factorization.

231322122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97194202 (or 97194200 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 231322122220 its reverse (22221223132), we get a palindrome (253543345352).

The spelling of 231322122220 in words is "two hundred thirty-one billion, three hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty".