321112313 has 4 divisors (see below), whose sum is σ = 321234420. Its totient is φ = 320990208.

The previous prime is 321112241. The next prime is 321112387. The reversal of 321112313 is 313211123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313211123 = 1741 ⋅179903.

It can be written as a sum of positive squares in 2 ways, for example, as 139051264 + 182061049 = 11792^2 + 13493^2 .

It is a cyclic number.

It is not a de Polignac number, because 321112313 - 2¹² = 321108217 is a prime.

It is a super-2 number, since 2×321112313² = 206226235120419938, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321112291 and 321112300.

It is not an unprimeable number, because it can be changed into a prime (326112313) 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, 57020 + ... + 62397.

It is an arithmetic number, because the mean of its divisors is an integer number (80308605).

Almost surely, 2^321112313 is an apocalyptic number.

It is an amenable number.

321112313 is a deficient number, since it is larger than the sum of its proper divisors (122107).

321112313 is a wasteful number, since it uses less digits than its factorization.

321112313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122106.

The product of its digits is 108, while the sum is 17.

The square root of 321112313 is about 17919.6069432340. The cubic root of 321112313 is about 684.7819740532.

Adding to 321112313 its reverse (313211123), we get a palindrome (634323436).

The spelling of 321112313 in words is "three hundred twenty-one million, one hundred twelve thousand, three hundred thirteen".