111311113111 has 4 divisors (see below), whose sum is σ = 121430305224. Its totient is φ = 101191921000.

The previous prime is 111311113087. The next prime is 111311113189.

It is a happy number.

111311113111 is nontrivially palindromic in base 10.

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 111311113111 - 2¹⁷ = 111310982039 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 (111311110111) 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, 5059596040 + ... + 5059596061.

It is an arithmetic number, because the mean of its divisors is an integer number (30357576306).

Almost surely, 2^111311113111 is an apocalyptic number.

111311113111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111311113111 is a deficient number, since it is larger than the sum of its proper divisors (10119192113).

111311113111 is a wasteful number, since it uses less digits than its factorization.

111311113111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10119192112.

The product of its digits is 9, while the sum is 16.

It can be divided in two parts, 111311 and 113111, that added together give a palindrome (224422).

The spelling of 111311113111 in words is "one hundred eleven billion, three hundred eleven million, one hundred thirteen thousand, one hundred eleven".