23131021300000 has 72 divisors (see below), whose sum is σ = 56920354840692. Its totient is φ = 9252408480000.

The previous prime is 23131021299923. The next prime is 23131021300007. The reversal of 23131021300000 is 312013132.

It can be written as a sum of positive squares in 6 ways, for example, as 746502912016 + 22384518387984 = 864004^2 + 4731228^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (23131021300007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115555107 + ... + 115755106.

Almost surely, 2^{23131021300000} is an apocalyptic number.

23131021300000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23131021300000 is an abundant number, since it is smaller than the sum of its proper divisors (33789333540692).

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

23131021300000 is an frugal number, since it uses more digits than its factorization.

23131021300000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231310248 (or 231310220 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 23131021300000 its reverse (312013132), we get a palindrome (23131333313132).

The spelling of 23131021300000 in words is "twenty-three trillion, one hundred thirty-one billion, twenty-one million, three hundred thousand".