321300320221 has 2 divisors, whose sum is σ = 321300320222. Its totient is φ = 321300320220.

The previous prime is 321300320213. The next prime is 321300320333. The reversal of 321300320221 is 122023003123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 300134144025 + 21166176196 = 547845^2 + 145486^2 .

It is a cyclic number.

It is not a de Polignac number, because 321300320221 - 2³ = 321300320213 is a prime.

It is a super-3 number, since 3×321300320221³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321300320921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160650160110 + 160650160111.

It is an arithmetic number, because the mean of its divisors is an integer number (160650160111).

Almost surely, 2^321300320221 is an apocalyptic number.

It is an amenable number.

321300320221 is a deficient number, since it is larger than the sum of its proper divisors (1).

321300320221 is an equidigital number, since it uses as much as digits as its factorization.

321300320221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 321300320221 its reverse (122023003123), we get a palindrome (443323323344).

The spelling of 321300320221 in words is "three hundred twenty-one billion, three hundred million, three hundred twenty thousand, two hundred twenty-one".