111111312011 has 8 divisors (see below), whose sum is σ = 128108112864. Its totient is φ = 94395450240.

The previous prime is 111111311999. The next prime is 111111312071. The reversal of 111111312011 is 110213111111.

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

It is a de Polignac number, because none of the positive numbers 2^k-111111312011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111111312071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70233920 + ... + 70235501.

It is an arithmetic number, because the mean of its divisors is an integer number (16013514108).

Almost surely, 2^111111312011 is an apocalyptic number.

111111312011 is a deficient number, since it is larger than the sum of its proper divisors (16996800853).

111111312011 is a wasteful number, since it uses less digits than its factorization.

111111312011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140469541.

The product of its (nonzero) digits is 6, while the sum is 14.

Adding to 111111312011 its reverse (110213111111), we get a palindrome (221324423122).

Subtracting from 111111312011 its reverse (110213111111), we obtain a square (898200900 = 29970²).

The spelling of 111111312011 in words is "one hundred eleven billion, one hundred eleven million, three hundred twelve thousand, eleven".