20012021112100 has 36 divisors (see below), whose sum is σ = 43509118595824. Its totient is φ = 7989502862880.

The previous prime is 20012021112079. The next prime is 20012021112137. The reversal of 20012021112100 is 121112021002.

It is a super-2 number, since 2×20012021112100² (a number of 27 digits) contains 22 as substring.

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, 191267214 + ... + 191371813.

Almost surely, 2^{20012021112100} is an apocalyptic number.

20012021112100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012021112100 is an abundant number, since it is smaller than the sum of its proper divisors (23497097483724).

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

20012021112100 is a wasteful number, since it uses less digits than its factorization.

20012021112100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382639564 (or 382639557 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20012021112100 its reverse (121112021002), we get a palindrome (20133133133102).

The spelling of 20012021112100 in words is "twenty trillion, twelve billion, twenty-one million, one hundred twelve thousand, one hundred".