12132321 has 8 divisors (see below), whose sum is σ = 16552800. Its totient is φ = 7900032.

The previous prime is 12132319. The next prime is 12132331. The reversal of 12132321 is 12323121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12132321 - 2¹ = 12132319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12132321.

It is not an unprimeable number, because it can be changed into a prime (12132301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46896 + ... + 47153.

It is an arithmetic number, because the mean of its divisors is an integer number (2069100).

Almost surely, 2^12132321 is an apocalyptic number.

It is an amenable number.

12132321 is a deficient number, since it is larger than the sum of its proper divisors (4420479).

12132321 is an equidigital number, since it uses as much as digits as its factorization.

12132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94095.

The product of its digits is 72, while the sum is 15.

The square root of 12132321 is about 3483.1481449976. The cubic root of 12132321 is about 229.7812728405.

Adding to 12132321 its reverse (12323121), we get a palindrome (24455442).

The spelling of 12132321 in words is "twelve million, one hundred thirty-two thousand, three hundred twenty-one".