1331322323213 has 4 divisors (see below), whose sum is σ = 1331326977180. Its totient is φ = 1331317669248.

The previous prime is 1331322323209. The next prime is 1331322323231. The reversal of 1331322323213 is 3123232231331.

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 755207926729 + 576114396484 = 869027^2 + 759022^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331322323213 - 2² = 1331322323209 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 (1331322323713) 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, 1867670 + ... + 2480087.

It is an arithmetic number, because the mean of its divisors is an integer number (332831744295).

Almost surely, 2^{1331322323213} is an apocalyptic number.

It is an amenable number.

1331322323213 is a deficient number, since it is larger than the sum of its proper divisors (4653967).

1331322323213 is an equidigital number, since it uses as much as digits as its factorization.

1331322323213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4653966.

The product of its digits is 11664, while the sum is 29.

Adding to 1331322323213 its reverse (3123232231331), we get a palindrome (4454554554544).

The spelling of 1331322323213 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-two million, three hundred twenty-three thousand, two hundred thirteen".