20021100110120 has 64 divisors (see below), whose sum is σ = 45406929715200. Its totient is φ = 7944550225920.

The previous prime is 20021100110107. The next prime is 20021100110149. The reversal of 20021100110120 is 2101100112002.

It is a super-2 number, since 2×20021100110120² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49537016 + ... + 49939544.

It is an arithmetic number, because the mean of its divisors is an integer number (709483276800).

Almost surely, 2^{20021100110120} is an apocalyptic number.

20021100110120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021100110120 is an abundant number, since it is smaller than the sum of its proper divisors (25385829605080).

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

20021100110120 is a wasteful number, since it uses less digits than its factorization.

20021100110120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412458 (or 412454 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20021100110120 its reverse (2101100112002), we get a palindrome (22122200222122).

The spelling of 20021100110120 in words is "twenty trillion, twenty-one billion, one hundred million, one hundred ten thousand, one hundred twenty".