111011111111011 has 4 divisors (see below), whose sum is σ = 111039265086832. Its totient is φ = 110982957135192.

The previous prime is 111011111110997. The next prime is 111011111111027. The reversal of 111011111111011 is 110111111110111.

It is a happy number.

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 111011111111011 - 2¹³ = 111011111102819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111011111110982 and 111011111111000.

It is not an unprimeable number, because it can be changed into a prime (111011111111051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14076981996 + ... + 14076989881.

It is an arithmetic number, because the mean of its divisors is an integer number (27759816271708).

Almost surely, 2^{111011111111011} is an apocalyptic number.

111011111111011 is a deficient number, since it is larger than the sum of its proper divisors (28153975821).

111011111111011 is an equidigital number, since it uses as much as digits as its factorization.

111011111111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28153975820.

The product of its (nonzero) digits is 1, while the sum is 13.

Adding to 111011111111011 its reverse (110111111110111), we get a palindrome (221122222221122).

The spelling of 111011111111011 in words is "one hundred eleven trillion, eleven billion, one hundred eleven million, one hundred eleven thousand, eleven".