1323321213 has 4 divisors (see below), whose sum is σ = 1764428288. Its totient is φ = 882214140.

The previous prime is 1323321133. The next prime is 1323321269. The reversal of 1323321213 is 3121233231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-1323321213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1323321213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323321313) 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 3 ways as a sum of consecutive naturals, for example, 220553533 + ... + 220553538.

It is an arithmetic number, because the mean of its divisors is an integer number (441107072).

Almost surely, 2^1323321213 is an apocalyptic number.

It is an amenable number.

1323321213 is a deficient number, since it is larger than the sum of its proper divisors (441107075).

1323321213 is an equidigital number, since it uses as much as digits as its factorization.

1323321213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441107074.

The product of its digits is 648, while the sum is 21.

The square root of 1323321213 is about 36377.4822245850. The cubic root of 1323321213 is about 1097.8805506071.

Adding to 1323321213 its reverse (3121233231), we get a palindrome (4444554444).

The spelling of 1323321213 in words is "one billion, three hundred twenty-three million, three hundred twenty-one thousand, two hundred thirteen".