12329221 has 4 divisors (see below), whose sum is σ = 12502944. Its totient is φ = 12155500.

The previous prime is 12329209. The next prime is 12329237. The reversal of 12329221 is 12292321.

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: 12292321 = 79 ⋅155599.

It is a cyclic number.

It is not a de Polignac number, because 12329221 - 2⁹ = 12328709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12329192 and 12329201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12329201) 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, 86755 + ... + 86896.

It is an arithmetic number, because the mean of its divisors is an integer number (3125736).

Almost surely, 2^12329221 is an apocalyptic number.

It is an amenable number.

12329221 is a deficient number, since it is larger than the sum of its proper divisors (173723).

12329221 is an equidigital number, since it uses as much as digits as its factorization.

12329221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173722.

The product of its digits is 432, while the sum is 22.

The square root of 12329221 is about 3511.2990473612. The cubic root of 12329221 is about 231.0176769766.

The spelling of 12329221 in words is "twelve million, three hundred twenty-nine thousand, two hundred twenty-one".