311223123331 has 4 divisors (see below), whose sum is σ = 321954955200. Its totient is φ = 300491291464.

The previous prime is 311223123317. The next prime is 311223123371. The reversal of 311223123331 is 133321322113.

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-311223123331 is a prime.

It is a super-2 number, since 2×311223123331² (a number of 24 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 = 311223123296 and 311223123305.

It is not an unprimeable number, because it can be changed into a prime (311223123311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5365915891 + ... + 5365915948.

It is an arithmetic number, because the mean of its divisors is an integer number (80488738800).

Almost surely, 2^311223123331 is an apocalyptic number.

311223123331 is a deficient number, since it is larger than the sum of its proper divisors (10731831869).

311223123331 is a wasteful number, since it uses less digits than its factorization.

311223123331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10731831868.

The product of its digits is 1944, while the sum is 25.

Adding to 311223123331 its reverse (133321322113), we get a palindrome (444544445444).

The spelling of 311223123331 in words is "three hundred eleven billion, two hundred twenty-three million, one hundred twenty-three thousand, three hundred thirty-one".