111011111011111 has 8 divisors (see below), whose sum is σ = 111103826722560. Its totient is φ = 110918433882168.

The previous prime is 111011111011109. The next prime is 111011111011147. The reversal of 111011111011111 is 111110111110111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111011111011111 - 2¹ = 111011111011109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111011111011091 and 111011111011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111011111011211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3887311 + ... + 15399136.

It is an arithmetic number, because the mean of its divisors is an integer number (13887978340320).

Almost surely, 2^{111011111011111} is an apocalyptic number.

111011111011111 is a deficient number, since it is larger than the sum of its proper divisors (92715711449).

111011111011111 is a wasteful number, since it uses less digits than its factorization.

111011111011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19291253.

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

Adding to 111011111011111 its reverse (111110111110111), we get a palindrome (222121222121222).

It can be divided in two parts, 1110111110111 and 11, that multiplied together give a palindrome (12211222211221).

The spelling of 111011111011111 in words is "one hundred eleven trillion, eleven billion, one hundred eleven million, eleven thousand, one hundred eleven".