23031001220 has 24 divisors (see below), whose sum is σ = 48370017024. Its totient is φ = 9211464416.

The previous prime is 23031001211. The next prime is 23031001223. The reversal of 23031001220 is 2210013032.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 23031001195 and 23031001204.

It is not an unprimeable number, because it can be changed into a prime (23031001223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163859 + ... + 270021.

It is an arithmetic number, because the mean of its divisors is an integer number (2015417376).

Almost surely, 2^23031001220 is an apocalyptic number.

23031001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23031001220 is an abundant number, since it is smaller than the sum of its proper divisors (25339015804).

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

23031001220 is a wasteful number, since it uses less digits than its factorization.

23031001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117019 (or 117017 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 23031001220 its reverse (2210013032), we get a palindrome (25241014252).

The spelling of 23031001220 in words is "twenty-three billion, thirty-one million, one thousand, two hundred twenty".