31313111211231 has 8 divisors (see below), whose sum is σ = 41756742963840. Its totient is φ = 20872443466392.

The previous prime is 31313111211229. The next prime is 31313111211247. The reversal of 31313111211231 is 13211211131313.

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

It is not a de Polignac number, because 31313111211231 - 2¹ = 31313111211229 is a prime.

It is a super-2 number, since 2×31313111211231² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313111211251) 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, 740977291 + ... + 741019548.

It is an arithmetic number, because the mean of its divisors is an integer number (5219592870480).

Almost surely, 2^{31313111211231} is an apocalyptic number.

31313111211231 is a deficient number, since it is larger than the sum of its proper divisors (10443631752609).

31313111211231 is a wasteful number, since it uses less digits than its factorization.

31313111211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482003885.

The product of its digits is 324, while the sum is 24.

Adding to 31313111211231 its reverse (13211211131313), we get a palindrome (44524322342544).

The spelling of 31313111211231 in words is "thirty-one trillion, three hundred thirteen billion, one hundred eleven million, two hundred eleven thousand, two hundred thirty-one".