1321340213 has 4 divisors (see below), whose sum is σ = 1321658208. Its totient is φ = 1321022220.

The previous prime is 1321340197. The next prime is 1321340219. The reversal of 1321340213 is 3120431231.

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 cyclic number.

It is not a de Polignac number, because 1321340213 - 2⁴ = 1321340197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321340219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152681 + ... + 161102.

It is an arithmetic number, because the mean of its divisors is an integer number (330414552).

Almost surely, 2^1321340213 is an apocalyptic number.

It is an amenable number.

1321340213 is a deficient number, since it is larger than the sum of its proper divisors (317995).

1321340213 is an equidigital number, since it uses as much as digits as its factorization.

1321340213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317994.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1321340213 is about 36350.2436443004. The cubic root of 1321340213 is about 1097.3324378934.

Adding to 1321340213 its reverse (3120431231), we get a palindrome (4441771444).

The spelling of 1321340213 in words is "one billion, three hundred twenty-one million, three hundred forty thousand, two hundred thirteen".