11142111 has 4 divisors (see below), whose sum is σ = 14856152. Its totient is φ = 7428072.

The previous prime is 11142107. The next prime is 11142181. The reversal of 11142111 is 11124111.

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

It is not a de Polignac number, because 11142111 - 2² = 11142107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1857016 + ... + 1857021.

It is an arithmetic number, because the mean of its divisors is an integer number (3714038).

Almost surely, 2^11142111 is an apocalyptic number.

11142111 is a deficient number, since it is larger than the sum of its proper divisors (3714041).

11142111 is an equidigital number, since it uses as much as digits as its factorization.

11142111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3714040.

The product of its digits is 8, while the sum is 12.

The square root of 11142111 is about 3337.9800778315. The cubic root of 11142111 is about 223.3516474672.

Adding to 11142111 its reverse (11124111), we get a palindrome (22266222).

The spelling of 11142111 in words is "eleven million, one hundred forty-two thousand, one hundred eleven".