111111111011011 has 4 divisors (see below), whose sum is σ = 111114545380552. Its totient is φ = 111107676641472.

The previous prime is 111111111010973. The next prime is 111111111011023. The reversal of 111111111011011 is 110110111111111.

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 111111111011011 - 2¹⁷ = 111111110879939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111111111010982 and 111111111011000.

It is not an unprimeable number, because it can be changed into a prime (111111111911011) 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, 1717136241 + ... + 1717200946.

It is an arithmetic number, because the mean of its divisors is an integer number (27778636345138).

Almost surely, 2^{111111111011011} is an apocalyptic number.

111111111011011 is a deficient number, since it is larger than the sum of its proper divisors (3434369541).

111111111011011 is an equidigital number, since it uses as much as digits as its factorization.

111111111011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434369540.

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

Adding to 111111111011011 its reverse (110110111111111), we get a palindrome (221221222122122).

It can be divided in two parts, 1111111 and 11011011, that multiplied together give a palindrome (12234455443221).

The spelling of 111111111011011 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred eleven million, eleven thousand, eleven".