331311203213 has 4 divisors (see below), whose sum is σ = 332770724160. Its totient is φ = 329851682268.

The previous prime is 331311203149. The next prime is 331311203303. The reversal of 331311203213 is 312302113133.

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 331311203213 - 2⁶ = 331311203149 is a prime.

It is a super-2 number, since 2×331311203213² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331311203513) 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, 729760133 + ... + 729760586.

It is an arithmetic number, because the mean of its divisors is an integer number (83192681040).

Almost surely, 2^331311203213 is an apocalyptic number.

It is an amenable number.

331311203213 is a deficient number, since it is larger than the sum of its proper divisors (1459520947).

331311203213 is a wasteful number, since it uses less digits than its factorization.

331311203213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459520946.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 331311203213 its reverse (312302113133), we get a palindrome (643613316346).

The spelling of 331311203213 in words is "three hundred thirty-one billion, three hundred eleven million, two hundred three thousand, two hundred thirteen".