111111201011011 has 4 divisors (see below), whose sum is σ = 111114448676272. Its totient is φ = 111107953345752.

The previous prime is 111111201010963. The next prime is 111111201011021. The reversal of 111111201011011 is 110110102111111.

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 111111201011011 - 2²⁵ = 111111167456579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111111201010982 and 111111201011000.

It is not an unprimeable number, because it can be changed into a prime (111111201011021) 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, 1623781311 + ... + 1623849736.

It is an arithmetic number, because the mean of its divisors is an integer number (27778612169068).

Almost surely, 2^{111111201011011} is an apocalyptic number.

111111201011011 is a deficient number, since it is larger than the sum of its proper divisors (3247665261).

111111201011011 is an equidigital number, since it uses as much as digits as its factorization.

111111201011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247665260.

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 111111201011011 its reverse (110110102111111), we get a palindrome (221221303122122).

The spelling of 111111201011011 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred one million, eleven thousand, eleven".