422191336621 has 2 divisors, whose sum is σ = 422191336622. Its totient is φ = 422191336620.

The previous prime is 422191336573. The next prime is 422191336627. The reversal of 422191336621 is 126633191224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418202782596 + 3988554025 = 646686^2 + 63155^2 .

It is a cyclic number.

It is not a de Polignac number, because 422191336621 - 2¹¹ = 422191334573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422191336627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211095668310 + 211095668311.

It is an arithmetic number, because the mean of its divisors is an integer number (211095668311).

Almost surely, 2^422191336621 is an apocalyptic number.

It is an amenable number.

422191336621 is a deficient number, since it is larger than the sum of its proper divisors (1).

422191336621 is an equidigital number, since it uses as much as digits as its factorization.

422191336621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 40.

The spelling of 422191336621 in words is "four hundred twenty-two billion, one hundred ninety-one million, three hundred thirty-six thousand, six hundred twenty-one".