321323303312 has 80 divisors (see below), whose sum is σ = 682002182400. Its totient is φ = 145446174720.

The previous prime is 321323303309. The next prime is 321323303317. The reversal of 321323303312 is 213303323123.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (321323303317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49668014 + ... + 49674482.

It is an arithmetic number, because the mean of its divisors is an integer number (8525027280).

Almost surely, 2^321323303312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321323303312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341001091200).

321323303312 is an abundant number, since it is smaller than the sum of its proper divisors (360678879088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321323303312 is a wasteful number, since it uses less digits than its factorization.

321323303312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7624 (or 7618 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 26.

Adding to 321323303312 its reverse (213303323123), we get a palindrome (534626626435).

The spelling of 321323303312 in words is "three hundred twenty-one billion, three hundred twenty-three million, three hundred three thousand, three hundred twelve".