11142012111 has 4 divisors (see below), whose sum is σ = 14856016152. Its totient is φ = 7428008072.

The previous prime is 11142012071. The next prime is 11142012121. The reversal of 11142012111 is 11121024111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11142012111 - 2²³ = 11133623503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142012121) 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, 1857002016 + ... + 1857002021.

It is an arithmetic number, because the mean of its divisors is an integer number (3714004038).

Almost surely, 2^11142012111 is an apocalyptic number.

11142012111 is a deficient number, since it is larger than the sum of its proper divisors (3714004041).

11142012111 is an equidigital number, since it uses as much as digits as its factorization.

11142012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3714004040.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11142012111 its reverse (11121024111), we get a palindrome (22263036222).

The spelling of 11142012111 in words is "eleven billion, one hundred forty-two million, twelve thousand, one hundred eleven".