11101111999 has 2 divisors, whose sum is σ = 11101112000. Its totient is φ = 11101111998.

The previous prime is 11101111963. The next prime is 11101112021. The reversal of 11101111999 is 99911110111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11101111999 - 2⁷ = 11101111871 is a prime.

It is a super-2 number, since 2×11101111999² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11101111909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550555999 + 5550556000.

It is an arithmetic number, because the mean of its divisors is an integer number (5550556000).

Almost surely, 2^11101111999 is an apocalyptic number.

11101111999 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101111999 is an equidigital number, since it uses as much as digits as its factorization.

11101111999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 34.

The spelling of 11101111999 in words is "eleven billion, one hundred one million, one hundred eleven thousand, nine hundred ninety-nine".