12321331 has 4 divisors (see below), whose sum is σ = 13441464. Its totient is φ = 11201200.

The previous prime is 12321319. The next prime is 12321341. The reversal of 12321331 is 13312321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13312321 = 11 ⋅1210211.

It is a cyclic number.

It is not a de Polignac number, because 12321331 - 2⁵ = 12321299 is a prime.

It is a super-2 number, since 2×12321331² = 303630395223122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12321301) 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, 560050 + ... + 560071.

It is an arithmetic number, because the mean of its divisors is an integer number (3360366).

Almost surely, 2^12321331 is an apocalyptic number.

12321331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12321331 is a deficient number, since it is larger than the sum of its proper divisors (1120133).

12321331 is a wasteful number, since it uses less digits than its factorization.

12321331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120132.

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

The square root of 12321331 is about 3510.1753517453. The cubic root of 12321331 is about 230.9683870709.

Adding to 12321331 its reverse (13312321), we get a palindrome (25633652).

The spelling of 12321331 in words is "twelve million, three hundred twenty-one thousand, three hundred thirty-one".