111131113 has 4 divisors (see below), whose sum is σ = 111277908. Its totient is φ = 110984320.

The previous prime is 111131087. The next prime is 111131123. The reversal of 111131113 is 311131111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311131111 = 29 ⋅10728659.

It can be written as a sum of positive squares in 2 ways, for example, as 29192409 + 81938704 = 5403^2 + 9052^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111131113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111131093 and 111131102.

It is not an unprimeable number, because it can be changed into a prime (111131123) 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, 72256 + ... + 73777.

It is an arithmetic number, because the mean of its divisors is an integer number (27819477).

Almost surely, 2^111131113 is an apocalyptic number.

It is an amenable number.

111131113 is a deficient number, since it is larger than the sum of its proper divisors (146795).

111131113 is an equidigital number, since it uses as much as digits as its factorization.

111131113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146794.

The product of its digits is 9, while the sum is 13.

The square root of 111131113 is about 10541.8742640955. The cubic root of 111131113 is about 480.7787027539.

Adding to 111131113 its reverse (311131111), we get a palindrome (422262224).

It can be divided in two parts, 1111 and 31113, that multiplied together give a palindrome (34566543).

The spelling of 111131113 in words is "one hundred eleven million, one hundred thirty-one thousand, one hundred thirteen".