11111110211111 has 4 divisors (see below), whose sum is σ = 11695905485400. Its totient is φ = 10526314936824.

The previous prime is 11111110211081. The next prime is 11111110211167. The reversal of 11111110211111 is 11111201111111.

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 11111110211111 - 2²² = 11111106016807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111110211191) 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, 292397637116 + ... + 292397637153.

It is an arithmetic number, because the mean of its divisors is an integer number (2923976371350).

Almost surely, 2^{11111110211111} is an apocalyptic number.

11111110211111 is a deficient number, since it is larger than the sum of its proper divisors (584795274289).

11111110211111 is an equidigital number, since it uses as much as digits as its factorization.

11111110211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584795274288.

The product of its (nonzero) digits is 2, while the sum is 14.

Adding to 11111110211111 its reverse (11111201111111), we get a palindrome (22222311322222).

The spelling of 11111110211111 in words is "eleven trillion, one hundred eleven billion, one hundred ten million, two hundred eleven thousand, one hundred eleven".