23121230100 has 36 divisors (see below), whose sum is σ = 66897426624. Its totient is φ = 6165661280.

The previous prime is 23121230087. The next prime is 23121230179. The reversal of 23121230100 is 103212132.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 23121230100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38535084 + ... + 38535683.

Almost surely, 2^23121230100 is an apocalyptic number.

23121230100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121230100 is an abundant number, since it is smaller than the sum of its proper divisors (43776196524).

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

23121230100 is a wasteful number, since it uses less digits than its factorization.

23121230100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77070784 (or 77070777 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 23121230100 its reverse (103212132), we get a palindrome (23224442232).

The spelling of 23121230100 in words is "twenty-three billion, one hundred twenty-one million, two hundred thirty thousand, one hundred".