422444203421 has 2 divisors, whose sum is σ = 422444203422. Its totient is φ = 422444203420.

The previous prime is 422444203403. The next prime is 422444203451. The reversal of 422444203421 is 124302444224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 414556987321 + 7887216100 = 643861^2 + 88810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422444203421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422444203451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211222101710 + 211222101711.

It is an arithmetic number, because the mean of its divisors is an integer number (211222101711).

Almost surely, 2^422444203421 is an apocalyptic number.

It is an amenable number.

422444203421 is a deficient number, since it is larger than the sum of its proper divisors (1).

422444203421 is an equidigital number, since it uses as much as digits as its factorization.

422444203421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 422444203421 its reverse (124302444224), we get a palindrome (546746647645).

The spelling of 422444203421 in words is "four hundred twenty-two billion, four hundred forty-four million, two hundred three thousand, four hundred twenty-one".