111441111 has 8 divisors (see below), whose sum is σ = 149167344. Its totient is φ = 74004480.

The previous prime is 111441107. The next prime is 111441133. The reversal of 111441111 is 111144111.

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

It is not a de Polignac number, because 111441111 - 2² = 111441107 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111441101) 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, 71500 + ... + 73041.

It is an arithmetic number, because the mean of its divisors is an integer number (18645918).

Almost surely, 2^111441111 is an apocalyptic number.

111441111 is a deficient number, since it is larger than the sum of its proper divisors (37726233).

111441111 is a wasteful number, since it uses less digits than its factorization.

111441111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144801.

The product of its digits is 16, while the sum is 15.

The square root of 111441111 is about 10556.5671977210. The cubic root of 111441111 is about 481.2253285604.

Adding to 111441111 its reverse (111144111), we get a palindrome (222585222).

The spelling of 111441111 in words is "one hundred eleven million, four hundred forty-one thousand, one hundred eleven".