322645221421 has 2 divisors, whose sum is σ = 322645221422. Its totient is φ = 322645221420.

The previous prime is 322645221419. The next prime is 322645221467. The reversal of 322645221421 is 124122546223.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321999502500 + 645718921 = 567450^2 + 25411^2 .

It is a cyclic number.

It is not a de Polignac number, because 322645221421 - 2¹ = 322645221419 is a prime.

It is a super-2 number, since 2×322645221421² (a number of 24 digits) contains 22 as substring.

Together with 322645221419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (322645921421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161322610710 + 161322610711.

It is an arithmetic number, because the mean of its divisors is an integer number (161322610711).

Almost surely, 2^322645221421 is an apocalyptic number.

It is an amenable number.

322645221421 is a deficient number, since it is larger than the sum of its proper divisors (1).

322645221421 is an equidigital number, since it uses as much as digits as its factorization.

322645221421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 34.

Adding to 322645221421 its reverse (124122546223), we get a palindrome (446767767644).

The spelling of 322645221421 in words is "three hundred twenty-two billion, six hundred forty-five million, two hundred twenty-one thousand, four hundred twenty-one".