422440321021 has 2 divisors, whose sum is σ = 422440321022. Its totient is φ = 422440321020.

The previous prime is 422440320959. The next prime is 422440321027. The reversal of 422440321021 is 120123044224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 405018960921 + 17421360100 = 636411^2 + 131990^2 .

It is a cyclic number.

It is not a de Polignac number, because 422440321021 - 2²⁹ = 421903450109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422440321027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211220160510 + 211220160511.

It is an arithmetic number, because the mean of its divisors is an integer number (211220160511).

Almost surely, 2^422440321021 is an apocalyptic number.

It is an amenable number.

422440321021 is a deficient number, since it is larger than the sum of its proper divisors (1).

422440321021 is an equidigital number, since it uses as much as digits as its factorization.

422440321021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 422440321021 its reverse (120123044224), we get a palindrome (542563365245).

It can be divided in two parts, 4224403 and 21021, that added together give a palindrome (4245424).

The spelling of 422440321021 in words is "four hundred twenty-two billion, four hundred forty million, three hundred twenty-one thousand, twenty-one".