212322200021 has 2 divisors, whose sum is σ = 212322200022. Its totient is φ = 212322200020.

The previous prime is 212322200011. The next prime is 212322200039. The reversal of 212322200021 is 120002223212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170742504100 + 41579695921 = 413210^2 + 203911^2 .

It is a cyclic number.

It is not a de Polignac number, because 212322200021 - 2²⁶ = 212255091157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212322200011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106161100010 + 106161100011.

It is an arithmetic number, because the mean of its divisors is an integer number (106161100011).

Almost surely, 2^212322200021 is an apocalyptic number.

It is an amenable number.

212322200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212322200021 is an equidigital number, since it uses as much as digits as its factorization.

212322200021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 212322200021 its reverse (120002223212), we get a palindrome (332324423233).

The spelling of 212322200021 in words is "two hundred twelve billion, three hundred twenty-two million, two hundred thousand, twenty-one".