12333221 has 4 divisors (see below), whose sum is σ = 12869472. Its totient is φ = 11796972.

The previous prime is 12333203. The next prime is 12333239. The reversal of 12333221 is 12233321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12233321 = 19 ⋅643859.

It is an interprime number because it is at equal distance from previous prime (12333203) and next prime (12333239).

It is a cyclic number.

It is not a de Polignac number, because 12333221 - 2⁶ = 12333157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12333221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12333271) 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, 268091 + ... + 268136.

It is an arithmetic number, because the mean of its divisors is an integer number (3217368).

Almost surely, 2^12333221 is an apocalyptic number.

It is an amenable number.

12333221 is a deficient number, since it is larger than the sum of its proper divisors (536251).

12333221 is an equidigital number, since it uses as much as digits as its factorization.

12333221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536250.

The product of its digits is 216, while the sum is 17.

The square root of 12333221 is about 3511.8685909356. The cubic root of 12333221 is about 231.0426574895.

Adding to 12333221 its reverse (12233321), we get a palindrome (24566542).

The spelling of 12333221 in words is "twelve million, three hundred thirty-three thousand, two hundred twenty-one".