1331202331213 has 4 divisors (see below), whose sum is σ = 1331387407548. Its totient is φ = 1331017254880.

The previous prime is 1331202331159. The next prime is 1331202331223. The reversal of 1331202331213 is 3121332021331.

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 709506351684 + 621695979529 = 842322^2 + 788477^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331202331213 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 (1331202331223) 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, 92527378 + ... + 92541763.

It is an arithmetic number, because the mean of its divisors is an integer number (332846851887).

Almost surely, 2^{1331202331213} is an apocalyptic number.

It is an amenable number.

1331202331213 is a deficient number, since it is larger than the sum of its proper divisors (185076335).

1331202331213 is an equidigital number, since it uses as much as digits as its factorization.

1331202331213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185076334.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1331202331213 its reverse (3121332021331), we get a palindrome (4452534352544).

The spelling of 1331202331213 in words is "one trillion, three hundred thirty-one billion, two hundred two million, three hundred thirty-one thousand, two hundred thirteen".