1331320210013 has 4 divisors (see below), whose sum is σ = 1331936278908. Its totient is φ = 1330704141120.

The previous prime is 1331320209991. The next prime is 1331320210081. The reversal of 1331320210013 is 3100120231331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1129771290649 + 201548919364 = 1062907^2 + 448942^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331320210013 - 2¹⁸ = 1331319947869 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 (1331320240013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308031206 + ... + 308035527.

It is an arithmetic number, because the mean of its divisors is an integer number (332984069727).

Almost surely, 2^{1331320210013} is an apocalyptic number.

It is an amenable number.

1331320210013 is a deficient number, since it is larger than the sum of its proper divisors (616068895).

1331320210013 is an equidigital number, since it uses as much as digits as its factorization.

1331320210013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616068894.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1331320210013 its reverse (3100120231331), we get a palindrome (4431440441344).

The spelling of 1331320210013 in words is "one trillion, three hundred thirty-one billion, three hundred twenty million, two hundred ten thousand, thirteen".