1320352321 has 4 divisors (see below), whose sum is σ = 1320435712. Its totient is φ = 1320268932.

The previous prime is 1320352309. The next prime is 1320352333. The reversal of 1320352321 is 1232530231.

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, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (1320352309) and next prime (1320352333).

It is a cyclic number.

It is not a de Polignac number, because 1320352321 - 2²⁹ = 783481409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320352292 and 1320352301.

It is not an unprimeable number, because it can be changed into a prime (1320352391) 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, 9825 + ... + 52318.

It is an arithmetic number, because the mean of its divisors is an integer number (330108928).

Almost surely, 2^1320352321 is an apocalyptic number.

It is an amenable number.

1320352321 is a deficient number, since it is larger than the sum of its proper divisors (83391).

1320352321 is an equidigital number, since it uses as much as digits as its factorization.

1320352321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83390.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1320352321 is about 36336.6525838581. The cubic root of 1320352321 is about 1097.0588983970.

Adding to 1320352321 its reverse (1232530231), we get a palindrome (2552882552).

The spelling of 1320352321 in words is "one billion, three hundred twenty million, three hundred fifty-two thousand, three hundred twenty-one".