11011101111111 has 4 divisors (see below), whose sum is σ = 14681468148152. Its totient is φ = 7340734074072.

The previous prime is 11011101111091. The next prime is 11011101111161. The reversal of 11011101111111 is 11111110111011.

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

It is not a de Polignac number, because 11011101111111 - 2⁵ = 11011101111079 is a prime.

It is a Duffinian number.

11011101111111 is a modest number, since divided by 1111111 gives 1101110 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011101111161) 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, 1835183518516 + ... + 1835183518521.

It is an arithmetic number, because the mean of its divisors is an integer number (3670367037038).

Almost surely, 2^{11011101111111} is an apocalyptic number.

11011101111111 is a deficient number, since it is larger than the sum of its proper divisors (3670367037041).

11011101111111 is an equidigital number, since it uses as much as digits as its factorization.

11011101111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670367037040.

The product of its (nonzero) digits is 1, while the sum is 12.

Adding to 11011101111111 its reverse (11111110111011), we get a palindrome (22122211222122).

It can be divided in two parts, 110111011 and 11111, that multiplied together give a palindrome (1223443443221).

The spelling of 11011101111111 in words is "eleven trillion, eleven billion, one hundred one million, one hundred eleven thousand, one hundred eleven".