111128201 has 8 divisors (see below), whose sum is σ = 117757224. Its totient is φ = 104509440.

The previous prime is 111128197. The next prime is 111128209. The reversal of 111128201 is 102821111.

It can be written as a sum of positive squares in 4 ways, for example, as 5017600 + 106110601 = 2240^2 + 10301^2 .

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 111128201 - 2² = 111128197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111128201.

It is not an unprimeable number, because it can be changed into a prime (111128209) 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, 41561 + ... + 44153.

It is an arithmetic number, because the mean of its divisors is an integer number (14719653).

Almost surely, 2^111128201 is an apocalyptic number.

It is an amenable number.

111128201 is a deficient number, since it is larger than the sum of its proper divisors (6629023).

111128201 is a wasteful number, since it uses less digits than its factorization.

111128201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5131.

The product of its (nonzero) digits is 32, while the sum is 17.

The square root of 111128201 is about 10541.7361473336. The cubic root of 111128201 is about 480.7745033905.

Adding to 111128201 its reverse (102821111), we get a palindrome (213949312).

The spelling of 111128201 in words is "one hundred eleven million, one hundred twenty-eight thousand, two hundred one".