20021020211100 has 72 divisors (see below), whose sum is σ = 57933478408960. Its totient is φ = 5338386348480.

The previous prime is 20021020211089. The next prime is 20021020211107. The reversal of 20021020211100 is 111202012002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021020211107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 543802 + ... + 6351201.

Almost surely, 2^{20021020211100} is an apocalyptic number.

20021020211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021020211100 is an abundant number, since it is smaller than the sum of its proper divisors (37912458197860).

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

20021020211100 is a wasteful number, since it uses less digits than its factorization.

20021020211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6904699 (or 6904692 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20021020211100 its reverse (111202012002), we get a palindrome (20132222223102).

The spelling of 20021020211100 in words is "twenty trillion, twenty-one billion, twenty million, two hundred eleven thousand, one hundred".