111111310111 has 4 divisors (see below), whose sum is σ = 111114628632. Its totient is φ = 111107991592.

The previous prime is 111111310103. The next prime is 111111310127. The reversal of 111111310111 is 111013111111.

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 111111310111 - 2³ = 111111310103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111111310091 and 111111310100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111316111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1608520 + ... + 1676173.

It is an arithmetic number, because the mean of its divisors is an integer number (27778657158).

Almost surely, 2^111111310111 is an apocalyptic number.

111111310111 is a deficient number, since it is larger than the sum of its proper divisors (3318521).

111111310111 is an equidigital number, since it uses as much as digits as its factorization.

111111310111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3318520.

The product of its (nonzero) digits is 3, while the sum is 13.

Adding to 111111310111 its reverse (111013111111), we get a palindrome (222124421222).

The spelling of 111111310111 in words is "one hundred eleven billion, one hundred eleven million, three hundred ten thousand, one hundred eleven".