12316321 has 2 divisors, whose sum is σ = 12316322. Its totient is φ = 12316320.

The previous prime is 12316289. The next prime is 12316349. The reversal of 12316321 is 12361321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7952400 + 4363921 = 2820^2 + 2089^2 .

It is a cyclic number.

It is not a de Polignac number, because 12316321 - 2⁵ = 12316289 is a prime.

It is a super-3 number, since 3×12316321³ (a number of 22 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (12316391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6158160 + 6158161.

It is an arithmetic number, because the mean of its divisors is an integer number (6158161).

Almost surely, 2^12316321 is an apocalyptic number.

It is an amenable number.

12316321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12316321 is an equidigital number, since it uses as much as digits as its factorization.

12316321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 12316321 is about 3509.4616396251. The cubic root of 12316321 is about 230.9370779942.

Adding to 12316321 its reverse (12361321), we get a palindrome (24677642).

The spelling of 12316321 in words is "twelve million, three hundred sixteen thousand, three hundred twenty-one".