321404212321393 has 2 divisors, whose sum is σ = 321404212321394. Its totient is φ = 321404212321392.

The previous prime is 321404212321303. The next prime is 321404212321403. The reversal of 321404212321393 is 393123212404123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314777747868529 + 6626464452864 = 17741977^2 + 2574192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321404212321393 is a prime.

It is not a weakly prime, because it can be changed into another prime (321404212321303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160702106160696 + 160702106160697.

It is an arithmetic number, because the mean of its divisors is an integer number (160702106160697).

Almost surely, 2^{321404212321393} is an apocalyptic number.

It is an amenable number.

321404212321393 is a deficient number, since it is larger than the sum of its proper divisors (1).

321404212321393 is an equidigital number, since it uses as much as digits as its factorization.

321404212321393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 321404212321393 in words is "three hundred twenty-one trillion, four hundred four billion, two hundred twelve million, three hundred twenty-one thousand, three hundred ninety-three".