321213403999 has 2 divisors, whose sum is σ = 321213404000. Its totient is φ = 321213403998.

The previous prime is 321213403937. The next prime is 321213404011. The reversal of 321213403999 is 999304312123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321213403999 - 2¹³ = 321213395807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321213403909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160606701999 + 160606702000.

It is an arithmetic number, because the mean of its divisors is an integer number (160606702000).

Almost surely, 2^321213403999 is an apocalyptic number.

321213403999 is a deficient number, since it is larger than the sum of its proper divisors (1).

321213403999 is an equidigital number, since it uses as much as digits as its factorization.

321213403999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 46.

The spelling of 321213403999 in words is "three hundred twenty-one billion, two hundred thirteen million, four hundred three thousand, nine hundred ninety-nine".