111511113 has 12 divisors (see below), whose sum is σ = 172956240. Its totient is φ = 63720552.

The previous prime is 111511091. The next prime is 111511157. The reversal of 111511113 is 311115111.

It is not a de Polignac number, because 111511113 - 2¹² = 111507017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111511092 and 111511101.

It is not an unprimeable number, because it can be changed into a prime (111511913) 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, 379143 + ... + 379436.

It is an arithmetic number, because the mean of its divisors is an integer number (14413020).

Almost surely, 2^111511113 is an apocalyptic number.

It is an amenable number.

111511113 is a deficient number, since it is larger than the sum of its proper divisors (61445127).

111511113 is an equidigital number, since it uses as much as digits as its factorization.

111511113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758596 (or 758589 counting only the distinct ones).

The product of its digits is 15, while the sum is 15.

The square root of 111511113 is about 10559.8822436616. The cubic root of 111511113 is about 481.3260684164.

Adding to 111511113 its reverse (311115111), we get a palindrome (422626224).

The spelling of 111511113 in words is "one hundred eleven million, five hundred eleven thousand, one hundred thirteen".