12321311 has 4 divisors (see below), whose sum is σ = 13046112. Its totient is φ = 11596512.

The previous prime is 12321301. The next prime is 12321319. The reversal of 12321311 is 11312321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11312321 = 157 ⋅72053.

It is a cyclic number.

It is not a de Polignac number, because 12321311 - 2⁶ = 12321247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321319) 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, 362375 + ... + 362408.

It is an arithmetic number, because the mean of its divisors is an integer number (3261528).

Almost surely, 2^12321311 is an apocalyptic number.

12321311 is a deficient number, since it is larger than the sum of its proper divisors (724801).

12321311 is an equidigital number, since it uses as much as digits as its factorization.

12321311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724800.

The product of its digits is 36, while the sum is 14.

The square root of 12321311 is about 3510.1725028836. The cubic root of 12321311 is about 230.9682621014.

Adding to 12321311 its reverse (11312321), we get a palindrome (23633632).

The spelling of 12321311 in words is "twelve million, three hundred twenty-one thousand, three hundred eleven".