31313130021213 has 8 divisors (see below), whose sum is σ = 41752755028128. Its totient is φ = 20874462514224.

The previous prime is 31313130021179. The next prime is 31313130021221. The reversal of 31313130021213 is 31212003131313.

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

It is not a de Polignac number, because 31313130021213 - 2⁸ = 31313130020957 is a prime.

It is a super-2 number, since 2×31313130021213² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313130021223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239298670 + ... + 239429487.

It is an arithmetic number, because the mean of its divisors is an integer number (5219094378516).

Almost surely, 2^{31313130021213} is an apocalyptic number.

It is an amenable number.

31313130021213 is a deficient number, since it is larger than the sum of its proper divisors (10439625006915).

31313130021213 is a wasteful number, since it uses less digits than its factorization.

31313130021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478749963.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31313130021213 its reverse (31212003131313), we get a palindrome (62525133152526).

The spelling of 31313130021213 in words is "thirty-one trillion, three hundred thirteen billion, one hundred thirty million, twenty-one thousand, two hundred thirteen".