12213123321 has 32 divisors (see below), whose sum is σ = 18737049600. Its totient is φ = 6931590336.

The previous prime is 12213123301. The next prime is 12213123343. The reversal of 12213123321 is 12332131221.

It is not a de Polignac number, because 12213123321 - 2⁷ = 12213123193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12213123301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2701555 + ... + 2706071.

It is an arithmetic number, because the mean of its divisors is an integer number (585532800).

Almost surely, 2^12213123321 is an apocalyptic number.

It is an amenable number.

12213123321 is a deficient number, since it is larger than the sum of its proper divisors (6523926279).

12213123321 is a wasteful number, since it uses less digits than its factorization.

12213123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5373.

The product of its digits is 432, while the sum is 21.

Adding to 12213123321 its reverse (12332131221), we get a palindrome (24545254542).

The spelling of 12213123321 in words is "twelve billion, two hundred thirteen million, one hundred twenty-three thousand, three hundred twenty-one".