12211321 has 8 divisors (see below), whose sum is σ = 13492224. Its totient is φ = 10992960.

The previous prime is 12211307. The next prime is 12211327. The reversal of 12211321 is 12311221.

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

It is a cyclic number.

It is not a de Polignac number, because 12211321 - 2⁷ = 12211193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15225 + ... + 16006.

It is an arithmetic number, because the mean of its divisors is an integer number (1686528).

Almost surely, 2^12211321 is an apocalyptic number.

It is an amenable number.

12211321 is a deficient number, since it is larger than the sum of its proper divisors (1280903).

12211321 is a wasteful number, since it uses less digits than its factorization.

12211321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31271.

The product of its digits is 24, while the sum is 13.

The square root of 12211321 is about 3494.4700599662. The cubic root of 12211321 is about 230.2789369394.

Adding to 12211321 its reverse (12311221), we get a palindrome (24522542).

The spelling of 12211321 in words is "twelve million, two hundred eleven thousand, three hundred twenty-one".