11111001109999 has 32 divisors (see below), whose sum is σ = 12954788582400. Its totient is φ = 9333388276992.

The previous prime is 11111001109997. The next prime is 11111001110003. The reversal of 11111001109999 is 99990110011111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11111001109999 - 2¹ = 11111001109997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111001109991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54537307 + ... + 54740659.

It is an arithmetic number, because the mean of its divisors is an integer number (404837143200).

Almost surely, 2^{11111001109999} is an apocalyptic number.

11111001109999 is a deficient number, since it is larger than the sum of its proper divisors (1843787472401).

11111001109999 is a wasteful number, since it uses less digits than its factorization.

11111001109999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204199.

The product of its (nonzero) digits is 6561, while the sum is 43.

The spelling of 11111001109999 in words is "eleven trillion, one hundred eleven billion, one million, one hundred nine thousand, nine hundred ninety-nine".