331231221312213 has 64 divisors (see below), whose sum is σ = 467397740298240. Its totient is φ = 208072214767872.

The previous prime is 331231221312179. The next prime is 331231221312221. The reversal of 331231221312213 is 312213122132133.

It is a happy number.

It is not a de Polignac number, because 331231221312213 - 2⁹ = 331231221311701 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331231221312613) 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 63 ways as a sum of consecutive naturals, for example, 11631520731 + ... + 11631549207.

It is an arithmetic number, because the mean of its divisors is an integer number (7303089692160).

Almost surely, 2^{331231221312213} is an apocalyptic number.

It is an amenable number.

331231221312213 is a deficient number, since it is larger than the sum of its proper divisors (136166518986027).

331231221312213 is a wasteful number, since it uses less digits than its factorization.

331231221312213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30346.

The product of its digits is 7776, while the sum is 30.

Adding to 331231221312213 its reverse (312213122132133), we get a palindrome (643444343444346).

The spelling of 331231221312213 in words is "three hundred thirty-one trillion, two hundred thirty-one billion, two hundred twenty-one million, three hundred twelve thousand, two hundred thirteen".