31312120333213 has 8 divisors (see below), whose sum is σ = 32965402944320. Its totient is φ = 29659365349920.

The previous prime is 31312120333187. The next prime is 31312120333261. The reversal of 31312120333213 is 31233302121313.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31312120333213 - 2¹³ = 31312120325021 is a prime.

It is a super-2 number, since 2×31312120333213² (a number of 28 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 (31312120333513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131785128 + ... + 132022513.

It is an arithmetic number, because the mean of its divisors is an integer number (4120675368040).

Almost surely, 2^{31312120333213} is an apocalyptic number.

It is an amenable number.

31312120333213 is a deficient number, since it is larger than the sum of its proper divisors (1653282611107).

31312120333213 is a wasteful number, since it uses less digits than its factorization.

31312120333213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263813907.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 31312120333213 its reverse (31233302121313), we get a palindrome (62545422454526).

The spelling of 31312120333213 in words is "thirty-one trillion, three hundred twelve billion, one hundred twenty million, three hundred thirty-three thousand, two hundred thirteen".