422322401021 has 2 divisors, whose sum is σ = 422322401022. Its totient is φ = 422322401020.

The previous prime is 422322401003. The next prime is 422322401057. The reversal of 422322401021 is 120104223224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 352830060025 + 69492340996 = 593995^2 + 263614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422322401021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422322401071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211161200510 + 211161200511.

It is an arithmetic number, because the mean of its divisors is an integer number (211161200511).

Almost surely, 2^422322401021 is an apocalyptic number.

It is an amenable number.

422322401021 is a deficient number, since it is larger than the sum of its proper divisors (1).

422322401021 is an equidigital number, since it uses as much as digits as its factorization.

422322401021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 422322401021 its reverse (120104223224), we get a palindrome (542426624245).

The spelling of 422322401021 in words is "four hundred twenty-two billion, three hundred twenty-two million, four hundred one thousand, twenty-one".