12224521 has 2 divisors, whose sum is σ = 12224522. Its totient is φ = 12224520.

The previous prime is 12224501. The next prime is 12224551. The reversal of 12224521 is 12542221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9455625 + 2768896 = 3075^2 + 1664^2 .

It is a cyclic number.

It is not a de Polignac number, because 12224521 - 2²³ = 3835913 is a prime.

It is not a weakly prime, because it can be changed into another prime (12224501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6112260 + 6112261.

It is an arithmetic number, because the mean of its divisors is an integer number (6112261).

Almost surely, 2^12224521 is an apocalyptic number.

It is an amenable number.

12224521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12224521 is an equidigital number, since it uses as much as digits as its factorization.

12224521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 320, while the sum is 19.

The square root of 12224521 is about 3496.3582482349. The cubic root of 12224521 is about 230.3618814836.

Adding to 12224521 its reverse (12542221), we get a palindrome (24766742).

The spelling of 12224521 in words is "twelve million, two hundred twenty-four thousand, five hundred twenty-one".