11112111 has 12 divisors (see below), whose sum is σ = 16096080. Its totient is φ = 7387200.

The previous prime is 11112109. The next prime is 11112113. The reversal of 11112111 is 11121111.

It is an interprime number because it is at equal distance from previous prime (11112109) and next prime (11112113).

It is not a de Polignac number, because 11112111 - 2¹ = 11112109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11112093 and 11112102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112113) 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, 2070 + ... + 5148.

It is an arithmetic number, because the mean of its divisors is an integer number (1341340).

Almost surely, 2^11112111 is an apocalyptic number.

11112111 is a deficient number, since it is larger than the sum of its proper divisors (4983969).

11112111 is a wasteful number, since it uses less digits than its factorization.

11112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486 (or 3483 counting only the distinct ones).

The product of its digits is 2, while the sum is 9.

The square root of 11112111 is about 3333.4833132926. The cubic root of 11112111 is about 223.1510100790.

Adding to 11112111 its reverse (11121111), we get a palindrome (22233222).

The spelling of 11112111 in words is "eleven million, one hundred twelve thousand, one hundred eleven".