21112020222100 has 72 divisors (see below), whose sum is σ = 47809802476800. Its totient is φ = 8076823793280.

The previous prime is 21112020222071. The next prime is 21112020222113. The reversal of 21112020222100 is 122202021112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22477701 + ... + 23398099.

It is an arithmetic number, because the mean of its divisors is an integer number (664025034400).

Almost surely, 2^{21112020222100} is an apocalyptic number.

21112020222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112020222100 is an abundant number, since it is smaller than the sum of its proper divisors (26697782254700).

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

21112020222100 is a wasteful number, since it uses less digits than its factorization.

21112020222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930409 (or 930402 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21112020222100 its reverse (122202021112), we get a palindrome (21234222243212).

The spelling of 21112020222100 in words is "twenty-one trillion, one hundred twelve billion, twenty million, two hundred twenty-two thousand, one hundred".