11142199 has 4 divisors (see below), whose sum is σ = 11324920. Its totient is φ = 10959480.

The previous prime is 11142181. The next prime is 11142211. The reversal of 11142199 is 99124111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99124111 = 2129 ⋅46559.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11142199 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 (11142899) 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, 91269 + ... + 91390.

It is an arithmetic number, because the mean of its divisors is an integer number (2831230).

Almost surely, 2^11142199 is an apocalyptic number.

11142199 is a deficient number, since it is larger than the sum of its proper divisors (182721).

11142199 is an equidigital number, since it uses as much as digits as its factorization.

11142199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182720.

The product of its digits is 648, while the sum is 28.

The square root of 11142199 is about 3337.9932594300. The cubic root of 11142199 is about 223.3522354735.

The spelling of 11142199 in words is "eleven million, one hundred forty-two thousand, one hundred ninety-nine".