20021110111100 has 108 divisors (see below), whose sum is σ = 50540682158064. Its totient is φ = 6864152440320.

The previous prime is 20021110111069. The next prime is 20021110111111. The reversal of 20021110111100 is 111101112002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 220371284 + ... + 220462116.

Almost surely, 2^{20021110111100} is an apocalyptic number.

20021110111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021110111100 is an abundant number, since it is smaller than the sum of its proper divisors (30519572046964).

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

20021110111100 is a wasteful number, since it uses less digits than its factorization.

20021110111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135844 (or 135830 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20021110111100 its reverse (111101112002), we get a palindrome (20132211223102).

The spelling of 20021110111100 in words is "twenty trillion, twenty-one billion, one hundred ten million, one hundred eleven thousand, one hundred".