12313321 has 4 divisors (see below), whose sum is σ = 13037652. Its totient is φ = 11588992.

The previous prime is 12313319. The next prime is 12313333. The reversal of 12313321 is 12331321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12331321 = 227 ⋅54323.

It can be written as a sum of positive squares in 2 ways, for example, as 4247721 + 8065600 = 2061^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 12313321 - 2¹ = 12313319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12313295 and 12313304.

It is not an unprimeable number, because it can be changed into a prime (12313361) 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, 362140 + ... + 362173.

It is an arithmetic number, because the mean of its divisors is an integer number (3259413).

Almost surely, 2^12313321 is an apocalyptic number.

It is an amenable number.

12313321 is a deficient number, since it is larger than the sum of its proper divisors (724331).

12313321 is an equidigital number, since it uses as much as digits as its factorization.

12313321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724330.

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

The square root of 12313321 is about 3509.0341976105. The cubic root of 12313321 is about 230.9183259796.

Adding to 12313321 its reverse (12331321), we get a palindrome (24644642).

The spelling of 12313321 in words is "twelve million, three hundred thirteen thousand, three hundred twenty-one".