311122022131 has 4 divisors (see below), whose sum is σ = 313360310200. Its totient is φ = 308883734064.

The previous prime is 311122022093. The next prime is 311122022177. The reversal of 311122022131 is 131220221113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131220221113 = 19 ⋅6906327427.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311122022131 is a prime.

It is a super-2 number, since 2×311122022131² (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 = 311122022099 and 311122022108.

It is not an unprimeable number, because it can be changed into a prime (311122025131) 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, 1119143826 + ... + 1119144103.

It is an arithmetic number, because the mean of its divisors is an integer number (78340077550).

Almost surely, 2^311122022131 is an apocalyptic number.

311122022131 is a deficient number, since it is larger than the sum of its proper divisors (2238288069).

311122022131 is a wasteful number, since it uses less digits than its factorization.

311122022131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238288068.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 311122022131 its reverse (131220221113), we get a palindrome (442342243244).

The spelling of 311122022131 in words is "three hundred eleven billion, one hundred twenty-two million, twenty-two thousand, one hundred thirty-one".