321012313 has 4 divisors (see below), whose sum is σ = 325075840. Its totient is φ = 316948788.

The previous prime is 321012287. The next prime is 321012337. The reversal of 321012313 is 313210123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321012313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321012113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2031645 + ... + 2031802.

It is an arithmetic number, because the mean of its divisors is an integer number (81268960).

Almost surely, 2^321012313 is an apocalyptic number.

It is an amenable number.

321012313 is a deficient number, since it is larger than the sum of its proper divisors (4063527).

321012313 is an equidigital number, since it uses as much as digits as its factorization.

321012313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063526.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 321012313 is about 17916.8164861953. The cubic root of 321012313 is about 684.7108823050.

Adding to 321012313 its reverse (313210123), we get a palindrome (634222436).

The spelling of 321012313 in words is "three hundred twenty-one million, twelve thousand, three hundred thirteen".