111131311 has 8 divisors (see below), whose sum is σ = 114960384. Its totient is φ = 107317560.

The previous prime is 111131309. The next prime is 111131327. The reversal of 111131311 is 113131111.

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 111131311 - 2¹ = 111131309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111131291 and 111131300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111131341) 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 7 ways as a sum of consecutive naturals, for example, 12030 + ... + 19156.

It is an arithmetic number, because the mean of its divisors is an integer number (14370048).

Almost surely, 2^111131311 is an apocalyptic number.

111131311 is a deficient number, since it is larger than the sum of its proper divisors (3829073).

111131311 is an equidigital number, since it uses as much as digits as its factorization.

111131311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7661.

The product of its digits is 9, while the sum is 13.

The square root of 111131311 is about 10541.8836552108. The cubic root of 111131311 is about 480.7789882849.

Adding to 111131311 its reverse (113131111), we get a palindrome (224262422).

It can be divided in two parts, 11 and 1131311, that multiplied together give a palindrome (12444421).

The spelling of 111131311 in words is "one hundred eleven million, one hundred thirty-one thousand, three hundred eleven".