311233211311331 has 4 divisors (see below), whose sum is σ = 311233635597000. Its totient is φ = 311232787025664.

The previous prime is 311233211311277. The next prime is 311233211311361. The reversal of 311233211311331 is 133113112332113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311233211311331 is a prime.

It is a super-2 number, since 2×311233211311331² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311233211311294 and 311233211311303.

It is not an unprimeable number, because it can be changed into a prime (311233211311361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211040606 + ... + 212510243.

It is an arithmetic number, because the mean of its divisors is an integer number (77808408899250).

Almost surely, 2^{311233211311331} is an apocalyptic number.

311233211311331 is a deficient number, since it is larger than the sum of its proper divisors (424285669).

311233211311331 is an equidigital number, since it uses as much as digits as its factorization.

311233211311331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424285668.

The product of its digits is 2916, while the sum is 29.

Adding to 311233211311331 its reverse (133113112332113), we get a palindrome (444346323643444).

The spelling of 311233211311331 in words is "three hundred eleven trillion, two hundred thirty-three billion, two hundred eleven million, three hundred eleven thousand, three hundred thirty-one".