20120212211100 has 36 divisors (see below), whose sum is σ = 58214480664984. Its totient is φ = 5365389922880.

The previous prime is 20120212211093. The next prime is 20120212211123. The reversal of 20120212211100 is 111221202102.

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 20120212211100.

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, 33533686719 + ... + 33533687318.

Almost surely, 2^{20120212211100} is an apocalyptic number.

20120212211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120212211100 is an abundant number, since it is smaller than the sum of its proper divisors (38094268453884).

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

20120212211100 is a wasteful number, since it uses less digits than its factorization.

20120212211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67067374054 (or 67067374047 counting only the distinct ones).

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

Adding to 20120212211100 its reverse (111221202102), we get a palindrome (20231433413202).

The spelling of 20120212211100 in words is "twenty trillion, one hundred twenty billion, two hundred twelve million, two hundred eleven thousand, one hundred".