1320103321 has 4 divisors (see below), whose sum is σ = 1321919872. Its totient is φ = 1318286772.

The previous prime is 1320103303. The next prime is 1320103339. The reversal of 1320103321 is 1233010231.

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 an emirpimes, since its reverse is a distinct semiprime: 1233010231 = 661 ⋅1865371.

It is an interprime number because it is at equal distance from previous prime (1320103303) and next prime (1320103339).

It is a cyclic number.

It is not a de Polignac number, because 1320103321 - 2²⁵ = 1286548889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320103295 and 1320103304.

It is not an unprimeable number, because it can be changed into a prime (1320103381) 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, 907185 + ... + 908638.

It is an arithmetic number, because the mean of its divisors is an integer number (330479968).

Almost surely, 2^1320103321 is an apocalyptic number.

It is an amenable number.

1320103321 is a deficient number, since it is larger than the sum of its proper divisors (1816551).

1320103321 is an equidigital number, since it uses as much as digits as its factorization.

1320103321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816550.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1320103321 is about 36333.2261298113. The cubic root of 1320103321 is about 1096.9899307346.

Adding to 1320103321 its reverse (1233010231), we get a palindrome (2553113552).

The spelling of 1320103321 in words is "one billion, three hundred twenty million, one hundred three thousand, three hundred twenty-one".