23121113100 has 36 divisors (see below), whose sum is σ = 66897088104. Its totient is φ = 6165630080.

The previous prime is 23121113033. The next prime is 23121113111. The reversal of 23121113100 is 131112132.

It is a happy number.

It is a super-2 number, since 2×23121113100² (a number of 22 digits) contains 22 as substring.

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 23121113100.

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, 38534889 + ... + 38535488.

Almost surely, 2^23121113100 is an apocalyptic number.

23121113100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121113100 is an abundant number, since it is smaller than the sum of its proper divisors (43775975004).

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

23121113100 is a wasteful number, since it uses less digits than its factorization.

23121113100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77070394 (or 77070387 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 23121113100 its reverse (131112132), we get a palindrome (23252225232).

The spelling of 23121113100 in words is "twenty-three billion, one hundred twenty-one million, one hundred thirteen thousand, one hundred".