311113121031 has 12 divisors (see below), whose sum is σ = 453834983160. Its totient is φ = 205355194800.

The previous prime is 311113121009. The next prime is 311113121057. The reversal of 311113121031 is 130121311113.

311113121031 is a `hidden beast` number, since 311 + 1 + 1 + 312 + 10 + 31 = 666.

It is not a de Polignac number, because 311113121031 - 2¹⁸ = 311112858887 is a prime.

It is a super-2 number, since 2×311113121031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311113120995 and 311113121013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311113121071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171128421 + ... + 171130238.

It is an arithmetic number, because the mean of its divisors is an integer number (37819581930).

Almost surely, 2^311113121031 is an apocalyptic number.

311113121031 is a deficient number, since it is larger than the sum of its proper divisors (142721862129).

311113121031 is a wasteful number, since it uses less digits than its factorization.

311113121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342258766 (or 342258763 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 311113121031 its reverse (130121311113), we get a palindrome (441234432144).

The spelling of 311113121031 in words is "three hundred eleven billion, one hundred thirteen million, one hundred twenty-one thousand, thirty-one".