1320321013 has 4 divisors (see below), whose sum is σ = 1440350208. Its totient is φ = 1200291820.

The previous prime is 1320321011. The next prime is 1320321017. The reversal of 1320321013 is 3101230231.

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 1320321013 - 2¹ = 1320321011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320321011) 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, 60014581 + ... + 60014602.

It is an arithmetic number, because the mean of its divisors is an integer number (360087552).

Almost surely, 2^1320321013 is an apocalyptic number.

It is an amenable number.

1320321013 is a deficient number, since it is larger than the sum of its proper divisors (120029195).

1320321013 is a wasteful number, since it uses less digits than its factorization.

1320321013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120029194.

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

The square root of 1320321013 is about 36336.2217766239. The cubic root of 1320321013 is about 1097.0502272288.

Adding to 1320321013 its reverse (3101230231), we get a palindrome (4421551244).

The spelling of 1320321013 in words is "one billion, three hundred twenty million, three hundred twenty-one thousand, thirteen".