12922321 has 4 divisors (see below), whose sum is σ = 13197312. Its totient is φ = 12647332.

The previous prime is 12922307. The next prime is 12922333. The reversal of 12922321 is 12322921.

12922321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 12322921 = 13 ⋅947917.

It is a cyclic number.

It is not a de Polignac number, because 12922321 - 2⁵ = 12922289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12922292 and 12922301.

It is not an unprimeable number, because it can be changed into a prime (12926321) 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, 137425 + ... + 137518.

It is an arithmetic number, because the mean of its divisors is an integer number (3299328).

Almost surely, 2^12922321 is an apocalyptic number.

It is an amenable number.

12922321 is a deficient number, since it is larger than the sum of its proper divisors (274991).

12922321 is an equidigital number, since it uses as much as digits as its factorization.

12922321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274990.

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

The square root of 12922321 is about 3594.7629963601. The cubic root of 12922321 is about 234.6642012464.

The spelling of 12922321 in words is "twelve million, nine hundred twenty-two thousand, three hundred twenty-one".