11111100101111 has 4 divisors (see below), whose sum is σ = 11244968777112. Its totient is φ = 10977231425112.

The previous prime is 11111100101083. The next prime is 11111100101243. The reversal of 11111100101111 is 11110100111111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111100101111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111100101092 and 11111100101101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111100101711) 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, 66934337876 + ... + 66934338041.

It is an arithmetic number, because the mean of its divisors is an integer number (2811242194278).

Almost surely, 2^{11111100101111} is an apocalyptic number.

11111100101111 is a deficient number, since it is larger than the sum of its proper divisors (133868676001).

11111100101111 is an equidigital number, since it uses as much as digits as its factorization.

11111100101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133868676000.

The product of its (nonzero) digits is 1, while the sum is 11.

Adding to 11111100101111 its reverse (11110100111111), we get a palindrome (22221200212222).

The spelling of 11111100101111 in words is "eleven trillion, one hundred eleven billion, one hundred million, one hundred one thousand, one hundred eleven".