1112111113 has 4 divisors (see below), whose sum is σ = 1112192208. Its totient is φ = 1112030020.

The previous prime is 1112111087. The next prime is 1112111123. The reversal of 1112111113 is 3111112111.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3111112111 = 173 ⋅17983307.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1112111113 is a prime.

It is a super-2 number, since 2×1112111113² = 2473582255316197538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112111093 and 1112111102.

It is not an unprimeable number, because it can be changed into a prime (1112111123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14323 + ... + 49288.

It is an arithmetic number, because the mean of its divisors is an integer number (278048052).

Almost surely, 2^1112111113 is an apocalyptic number.

It is an amenable number.

1112111113 is a deficient number, since it is larger than the sum of its proper divisors (81095).

1112111113 is an equidigital number, since it uses as much as digits as its factorization.

1112111113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81094.

The product of its digits is 6, while the sum is 13.

The square root of 1112111113 is about 33348.3299881718. The cubic root of 1112111113 is about 1036.0547993181.

Adding to 1112111113 its reverse (3111112111), we get a palindrome (4223223224).

It can be divided in two parts, 1112 and 111113, that added together give a square (112225 = 335²).

The spelling of 1112111113 in words is "one billion, one hundred twelve million, one hundred eleven thousand, one hundred thirteen".