422132112821 has 2 divisors, whose sum is σ = 422132112822. Its totient is φ = 422132112820.

The previous prime is 422132112751. The next prime is 422132112823. The reversal of 422132112821 is 128211231224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376119717796 + 46012395025 = 613286^2 + 214505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422132112821 is a prime.

Together with 422132112823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422132112823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211066056410 + 211066056411.

It is an arithmetic number, because the mean of its divisors is an integer number (211066056411).

Almost surely, 2^422132112821 is an apocalyptic number.

It is an amenable number.

422132112821 is a deficient number, since it is larger than the sum of its proper divisors (1).

422132112821 is an equidigital number, since it uses as much as digits as its factorization.

422132112821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 29.

The spelling of 422132112821 in words is "four hundred twenty-two billion, one hundred thirty-two million, one hundred twelve thousand, eight hundred twenty-one".