331131002122213 has 4 divisors (see below), whose sum is σ = 331276939102060. Its totient is φ = 330985065142368.

The previous prime is 331131002122127. The next prime is 331131002122303. The reversal of 331131002122213 is 312221200131133.

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 176695155484929 + 154435846637284 = 13292673^2 + 12427222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331131002122213 is a prime.

It is a super-2 number, since 2×331131002122213² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331131002122813) 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, 72968486520 + ... + 72968491057.

It is an arithmetic number, because the mean of its divisors is an integer number (82819234775515).

Almost surely, 2^{331131002122213} is an apocalyptic number.

It is an amenable number.

331131002122213 is a deficient number, since it is larger than the sum of its proper divisors (145936979847).

331131002122213 is a wasteful number, since it uses less digits than its factorization.

331131002122213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145936979846.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 331131002122213 its reverse (312221200131133), we get a palindrome (643352202253346).

The spelling of 331131002122213 in words is "three hundred thirty-one trillion, one hundred thirty-one billion, two million, one hundred twenty-two thousand, two hundred thirteen".