210022202000021 has 4 divisors (see below), whose sum is σ = 210059887668972. Its totient is φ = 209984516331072.

The previous prime is 210022201999991. The next prime is 210022202000027. The reversal of 210022202000021 is 120000202220012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52574666203921 + 157447535796100 = 7250839^2 + 12547810^2 .

It is a cyclic number.

It is not a de Polignac number, because 210022202000021 - 2²⁶ = 210022134891157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210022202000027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18842826116 + ... + 18842837261.

It is an arithmetic number, because the mean of its divisors is an integer number (52514971917243).

Almost surely, 2^{210022202000021} is an apocalyptic number.

It is an amenable number.

210022202000021 is a deficient number, since it is larger than the sum of its proper divisors (37685668951).

210022202000021 is an equidigital number, since it uses as much as digits as its factorization.

210022202000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37685668950.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 210022202000021 its reverse (120000202220012), we get a palindrome (330022404220033).

The spelling of 210022202000021 in words is "two hundred ten trillion, twenty-two billion, two hundred two million, twenty-one", and thus it is an aban number.