11199111 has 16 divisors (see below), whose sum is σ = 18617088. Its totient is φ = 5817600.

The previous prime is 11199103. The next prime is 11199121.

11199111 is nontrivially palindromic in base 10.

11199111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11199111 - 2³ = 11199103 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11199101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24010 + ... + 24471.

It is an arithmetic number, because the mean of its divisors is an integer number (1163568).

Almost surely, 2^11199111 is an apocalyptic number.

11199111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11199111 is a deficient number, since it is larger than the sum of its proper divisors (7417977).

11199111 is a wasteful number, since it uses less digits than its factorization.

11199111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48502.

The product of its digits is 81, while the sum is 24.

The square root of 11199111 is about 3346.5072837213. The cubic root of 11199111 is about 223.7318685307.

The spelling of 11199111 in words is "eleven million, one hundred ninety-nine thousand, one hundred eleven".