422412320221 has 2 divisors, whose sum is σ = 422412320222. Its totient is φ = 422412320220.

The previous prime is 422412320207. The next prime is 422412320263. The reversal of 422412320221 is 122023214224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 421051743225 + 1360576996 = 648885^2 + 36886^2 .

It is a cyclic number.

It is not a de Polignac number, because 422412320221 - 2⁵ = 422412320189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422412320021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211206160110 + 211206160111.

It is an arithmetic number, because the mean of its divisors is an integer number (211206160111).

Almost surely, 2^422412320221 is an apocalyptic number.

It is an amenable number.

422412320221 is a deficient number, since it is larger than the sum of its proper divisors (1).

422412320221 is an equidigital number, since it uses as much as digits as its factorization.

422412320221 is an evil number, because the sum of its binary digits is even.

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

Adding to 422412320221 its reverse (122023214224), we get a palindrome (544435534445).

The spelling of 422412320221 in words is "four hundred twenty-two billion, four hundred twelve million, three hundred twenty thousand, two hundred twenty-one".