111311143 has 8 divisors (see below), whose sum is σ = 113054400. Its totient is φ = 109579008.

The previous prime is 111311131. The next prime is 111311147. The reversal of 111311143 is 341113111.

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 111311143 - 2¹⁷ = 111180071 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 (111311147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18655 + ... + 23887.

It is an arithmetic number, because the mean of its divisors is an integer number (14131800).

Almost surely, 2^111311143 is an apocalyptic number.

111311143 is a deficient number, since it is larger than the sum of its proper divisors (1743257).

111311143 is an equidigital number, since it uses as much as digits as its factorization.

111311143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5561.

The product of its digits is 36, while the sum is 16.

The square root of 111311143 is about 10550.4096129013. The cubic root of 111311143 is about 481.0381797227.

Adding to 111311143 its reverse (341113111), we get a palindrome (452424254).

The spelling of 111311143 in words is "one hundred eleven million, three hundred eleven thousand, one hundred forty-three".