21021100202022 has 16 divisors (see below), whose sum is σ = 42349077780912. Its totient is φ = 6955887171200.

The previous prime is 21021100201999. The next prime is 21021100202023. The reversal of 21021100202022 is 22020200112012.

It is a junction number, because it is equal to n+sod(n) for n = 21021100201992 and 21021100202010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021100202023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12786556479 + ... + 12786558122.

It is an arithmetic number, because the mean of its divisors is an integer number (2646817361307).

Almost surely, 2^{21021100202022} is an apocalyptic number.

21021100202022 is an abundant number, since it is smaller than the sum of its proper divisors (21327977578890).

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

21021100202022 is a wasteful number, since it uses less digits than its factorization.

21021100202022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25573114743.

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

Adding to 21021100202022 its reverse (22020200112012), we get a palindrome (43041300314034).

The spelling of 21021100202022 in words is "twenty-one trillion, twenty-one billion, one hundred million, two hundred two thousand, twenty-two".