311131103031031 has 4 divisors (see below), whose sum is σ = 312489754136200. Its totient is φ = 309772451925864.

The previous prime is 311131103030981. The next prime is 311131103031043. The reversal of 311131103031031 is 130130301131113.

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

It is a cyclic number.

It is not a de Polignac number, because 311131103031031 - 2²¹ = 311131100933879 is a prime.

It is a super-2 number, since 2×311131103031031² (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 = 311131103030993 and 311131103031011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311131103031431) 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, 679325552241 + ... + 679325552698.

It is an arithmetic number, because the mean of its divisors is an integer number (78122438534050).

Almost surely, 2^{311131103031031} is an apocalyptic number.

311131103031031 is a deficient number, since it is larger than the sum of its proper divisors (1358651105169).

311131103031031 is a wasteful number, since it uses less digits than its factorization.

311131103031031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358651105168.

The product of its (nonzero) digits is 243, while the sum is 22.

Adding to 311131103031031 its reverse (130130301131113), we get a palindrome (441261404162144).

The spelling of 311131103031031 in words is "three hundred eleven trillion, one hundred thirty-one billion, one hundred three million, thirty-one thousand, thirty-one".