311321232133 has 4 divisors (see below), whose sum is σ = 327706560160. Its totient is φ = 294935904108.

The previous prime is 311321232119. The next prime is 311321232139. The reversal of 311321232133 is 331232123113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 311321232133 - 2⁹ = 311321231621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311321232098 and 311321232107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311321232139) 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, 8192663985 + ... + 8192664022.

It is an arithmetic number, because the mean of its divisors is an integer number (81926640040).

Almost surely, 2^311321232133 is an apocalyptic number.

It is an amenable number.

311321232133 is a deficient number, since it is larger than the sum of its proper divisors (16385328027).

311321232133 is a wasteful number, since it uses less digits than its factorization.

311321232133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16385328026.

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

Adding to 311321232133 its reverse (331232123113), we get a palindrome (642553355246).

The spelling of 311321232133 in words is "three hundred eleven billion, three hundred twenty-one million, two hundred thirty-two thousand, one hundred thirty-three".