321043040399 has 2 divisors, whose sum is σ = 321043040400. Its totient is φ = 321043040398.

The previous prime is 321043040387. The next prime is 321043040467. The reversal of 321043040399 is 993040340123.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321043040399 - 2²⁴ = 321026263183 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321043040369) 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, 160521520199 + 160521520200.

It is an arithmetic number, because the mean of its divisors is an integer number (160521520200).

Almost surely, 2^321043040399 is an apocalyptic number.

321043040399 is a deficient number, since it is larger than the sum of its proper divisors (1).

321043040399 is an equidigital number, since it uses as much as digits as its factorization.

321043040399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 38.

The spelling of 321043040399 in words is "three hundred twenty-one billion, forty-three million, forty thousand, three hundred ninety-nine".