1304322420221 has 2 divisors, whose sum is σ = 1304322420222. Its totient is φ = 1304322420220.

The previous prime is 1304322420217. The next prime is 1304322420251. The reversal of 1304322420221 is 1220242234031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 700671117721 + 603651302500 = 837061^2 + 776950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304322420221 - 2² = 1304322420217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1304322420251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652161210110 + 652161210111.

It is an arithmetic number, because the mean of its divisors is an integer number (652161210111).

Almost surely, 2^{1304322420221} is an apocalyptic number.

It is an amenable number.

1304322420221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304322420221 is an equidigital number, since it uses as much as digits as its factorization.

1304322420221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 1304322420221 its reverse (1220242234031), we get a palindrome (2524564654252).

The spelling of 1304322420221 in words is "one trillion, three hundred four billion, three hundred twenty-two million, four hundred twenty thousand, two hundred twenty-one".