1224321213 has 32 divisors (see below), whose sum is σ = 1716785280. Its totient is φ = 775362560.

The previous prime is 1224321209. The next prime is 1224321227. The reversal of 1224321213 is 3121234221.

It is a cyclic number.

It is not a de Polignac number, because 1224321213 - 2² = 1224321209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1224321213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224321233) 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 in 31 ways as a sum of consecutive naturals, for example, 819295 + ... + 820787.

It is an arithmetic number, because the mean of its divisors is an integer number (53649540).

Almost surely, 2^1224321213 is an apocalyptic number.

It is an amenable number.

1224321213 is a deficient number, since it is larger than the sum of its proper divisors (492464067).

1224321213 is a wasteful number, since it uses less digits than its factorization.

1224321213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709.

The product of its digits is 576, while the sum is 21.

The square root of 1224321213 is about 34990.3016991852. The cubic root of 1224321213 is about 1069.7898131412.

Adding to 1224321213 its reverse (3121234221), we get a palindrome (4345555434).

The spelling of 1224321213 in words is "one billion, two hundred twenty-four million, three hundred twenty-one thousand, two hundred thirteen".