11000111111 has 4 divisors (see below), whose sum is σ = 12000121224. Its totient is φ = 10000101000.

The previous prime is 11000111093. The next prime is 11000111117. The reversal of 11000111111 is 11111100011.

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 11000111111 - 2¹⁸ = 10999848967 is a prime.

It is a Duffinian number.

11000111111 is a modest number, since divided by 111111 gives 11000 as remainder.

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 (11000111117) 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, 500005040 + ... + 500005061.

It is an arithmetic number, because the mean of its divisors is an integer number (3000030306).

Almost surely, 2^11000111111 is an apocalyptic number.

11000111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11000111111 is a deficient number, since it is larger than the sum of its proper divisors (1000010113).

11000111111 is a wasteful number, since it uses less digits than its factorization.

11000111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000010112.

The product of its (nonzero) digits is 1, while the sum is 8.

Adding to 11000111111 its reverse (11111100011), we get a palindrome (22111211122).

It can be divided in two parts, 1100011 and 1111, that multiplied together give a palindrome (1222112221).

The spelling of 11000111111 in words is "eleven billion, one hundred eleven thousand, one hundred eleven".