12224243221 has 2 divisors, whose sum is σ = 12224243222. Its totient is φ = 12224243220.

The previous prime is 12224243209. The next prime is 12224243243. The reversal of 12224243221 is 12234242221.

12224243221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7334038321 + 4890204900 = 85639^2 + 69930^2 .

It is a cyclic number.

It is not a de Polignac number, because 12224243221 - 2⁷ = 12224243093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12224243201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6112121610 + 6112121611.

It is an arithmetic number, because the mean of its divisors is an integer number (6112121611).

Almost surely, 2^12224243221 is an apocalyptic number.

It is an amenable number.

12224243221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12224243221 is an equidigital number, since it uses as much as digits as its factorization.

12224243221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 25.

Adding to 12224243221 its reverse (12234242221), we get a palindrome (24458485442).

The spelling of 12224243221 in words is "twelve billion, two hundred twenty-four million, two hundred forty-three thousand, two hundred twenty-one".