12121102202100 has 72 divisors (see below), whose sum is σ = 35081939383008. Its totient is φ = 3231229372800.

The previous prime is 12121102202093. The next prime is 12121102202117. The reversal of 12121102202100 is 120220112121.

It is a super-2 number, since 2×12121102202100² (a number of 27 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 12121102202100.

It is a congruent number.

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, 5740806 + ... + 7563005.

Almost surely, 2^{12121102202100} is an apocalyptic number.

12121102202100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121102202100 is an abundant number, since it is smaller than the sum of its proper divisors (22960837180908).

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

12121102202100 is a wasteful number, since it uses less digits than its factorization.

12121102202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13306865 (or 13306858 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12121102202100 its reverse (120220112121), we get a palindrome (12241322314221).

The spelling of 12121102202100 in words is "twelve trillion, one hundred twenty-one billion, one hundred two million, two hundred two thousand, one hundred".