321220321033193 has 2 divisors, whose sum is σ = 321220321033194. Its totient is φ = 321220321033192.

The previous prime is 321220321033189. The next prime is 321220321033301. The reversal of 321220321033193 is 391330123022123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 270337949989849 + 50882371043344 = 16441957^2 + 7133188^2 .

It is an emirp because it is prime and its reverse (391330123022123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321220321033193 - 2² = 321220321033189 is a prime.

It is not a weakly prime, because it can be changed into another prime (321220321033093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160610160516596 + 160610160516597.

It is an arithmetic number, because the mean of its divisors is an integer number (160610160516597).

Almost surely, 2^{321220321033193} is an apocalyptic number.

It is an amenable number.

321220321033193 is a deficient number, since it is larger than the sum of its proper divisors (1).

321220321033193 is an equidigital number, since it uses as much as digits as its factorization.

321220321033193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 35.

The spelling of 321220321033193 in words is "three hundred twenty-one trillion, two hundred twenty billion, three hundred twenty-one million, thirty-three thousand, one hundred ninety-three".