111311 has 4 divisors (see below), whose sum is σ = 112800. Its totient is φ = 109824.

The previous prime is 111301. The next prime is 111317. The reversal of 111311 is 113111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111311 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 (111317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626 + ... + 783.

It is an arithmetic number, because the mean of its divisors is an integer number (28200).

2¹¹¹³¹¹ is an apocalyptic number.

111311 is a deficient number, since it is larger than the sum of its proper divisors (1489).

111311 is an equidigital number, since it uses as much as digits as its factorization.

111311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488.

The product of its digits is 3, while the sum is 8.

The square root of 111311 is about 333.6330319378. The cubic root of 111311 is about 48.1037973728.

Adding to 111311 its reverse (113111), we get a palindrome (224422).

The spelling of 111311 in words is "one hundred eleven thousand, three hundred eleven", and thus it is an iban number.