23121313100 has 18 divisors (see below), whose sum is σ = 50173249644. Its totient is φ = 9248525200.

The previous prime is 23121313049. The next prime is 23121313211. The reversal of 23121313100 is 131312132.

It is a super-2 number, since 2×23121313100² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115606466 + ... + 115606665.

It is an arithmetic number, because the mean of its divisors is an integer number (2787402758).

Almost surely, 2^23121313100 is an apocalyptic number.

23121313100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121313100 is an abundant number, since it is smaller than the sum of its proper divisors (27051936544).

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

23121313100 is a wasteful number, since it uses less digits than its factorization.

23121313100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231213145 (or 231213138 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 23121313100 its reverse (131312132), we get a palindrome (23252625232).

The spelling of 23121313100 in words is "twenty-three billion, one hundred twenty-one million, three hundred thirteen thousand, one hundred".