311111112113 has 4 divisors (see below), whose sum is σ = 311136715380. Its totient is φ = 311085508848.

The previous prime is 311111112089. The next prime is 311111112133. The reversal of 311111112113 is 311211111113.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48359528464 + 262751583649 = 219908^2 + 512593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311111112113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311111112091 and 311111112100.

It is not an unprimeable number, because it can be changed into a prime (311111112133) 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, 12783398 + ... + 12807711.

It is an arithmetic number, because the mean of its divisors is an integer number (77784178845).

Almost surely, 2^311111112113 is an apocalyptic number.

It is an amenable number.

311111112113 is a deficient number, since it is larger than the sum of its proper divisors (25603267).

311111112113 is a wasteful number, since it uses less digits than its factorization.

311111112113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25603266.

The product of its digits is 18, while the sum is 17.

Adding to 311111112113 its reverse (311211111113), we get a palindrome (622322223226).

The spelling of 311111112113 in words is "three hundred eleven billion, one hundred eleven million, one hundred twelve thousand, one hundred thirteen".