12121132100 has 72 divisors (see below), whose sum is σ = 32793192768. Its totient is φ = 3778012800.

The previous prime is 12121132097. The next prime is 12121132151. The reversal of 12121132100 is 123112121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 779387 + ... + 794786.

Almost surely, 2^12121132100 is an apocalyptic number.

12121132100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121132100 is an abundant number, since it is smaller than the sum of its proper divisors (20672060668).

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

12121132100 is a wasteful number, since it uses less digits than its factorization.

12121132100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574205 (or 1574198 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12121132100 its reverse (123112121), we get a palindrome (12244244221).

The spelling of 12121132100 in words is "twelve billion, one hundred twenty-one million, one hundred thirty-two thousand, one hundred".