1320120313 has 4 divisors (see below), whose sum is σ = 1320267600. Its totient is φ = 1319973028.

The previous prime is 1320120287. The next prime is 1320120317. The reversal of 1320120313 is 3130210231.

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 a de Polignac number, because none of the positive numbers 2^k-1320120313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320120317) 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, 59263 + ... + 78436.

It is an arithmetic number, because the mean of its divisors is an integer number (330066900).

Almost surely, 2^1320120313 is an apocalyptic number.

It is an amenable number.

1320120313 is a deficient number, since it is larger than the sum of its proper divisors (147287).

1320120313 is an equidigital number, since it uses as much as digits as its factorization.

1320120313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147286.

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

The square root of 1320120313 is about 36333.4599646111. The cubic root of 1320120313 is about 1096.9946374301.

Adding to 1320120313 its reverse (3130210231), we get a palindrome (4450330544).

The spelling of 1320120313 in words is "one billion, three hundred twenty million, one hundred twenty thousand, three hundred thirteen".