21120200022021 has 16 divisors (see below), whose sum is σ = 28310682027264. Its totient is φ = 14004948916224.

The previous prime is 21120200022013. The next prime is 21120200022023. The reversal of 21120200022021 is 12022000202112.

It is not a de Polignac number, because 21120200022021 - 2³ = 21120200022013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120200022023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 739185 + ... + 6541161.

It is an arithmetic number, because the mean of its divisors is an integer number (1769417626704).

Almost surely, 2^{21120200022021} is an apocalyptic number.

It is an amenable number.

21120200022021 is a deficient number, since it is larger than the sum of its proper divisors (7190482005243).

21120200022021 is a wasteful number, since it uses less digits than its factorization.

21120200022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5808460.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21120200022021 its reverse (12022000202112), we get a palindrome (33142200224133).

The spelling of 21120200022021 in words is "twenty-one trillion, one hundred twenty billion, two hundred million, twenty-two thousand, twenty-one".