321323312999 has 4 divisors (see below), whose sum is σ = 346040490936. Its totient is φ = 296606135064.

The previous prime is 321323312983. The next prime is 321323313083. The reversal of 321323312999 is 999213323123.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999213323123 = 161093 ⋅6202711.

It is a cyclic number.

It is not a de Polignac number, because 321323312999 - 2⁴ = 321323312983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321323312939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12358588949 + ... + 12358588974.

It is an arithmetic number, because the mean of its divisors is an integer number (86510122734).

Almost surely, 2^321323312999 is an apocalyptic number.

321323312999 is a deficient number, since it is larger than the sum of its proper divisors (24717177937).

321323312999 is a wasteful number, since it uses less digits than its factorization.

321323312999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24717177936.

The product of its digits is 472392, while the sum is 47.

The spelling of 321323312999 in words is "three hundred twenty-one billion, three hundred twenty-three million, three hundred twelve thousand, nine hundred ninety-nine".