111121115 has 8 divisors (see below), whose sum is σ = 152394720. Its totient is φ = 76197312.

The previous prime is 111121097. The next prime is 111121117. The reversal of 111121115 is 511121111.

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 111121115 - 2¹⁰ = 111120091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111121115.

It is not an unprimeable number, because it can be changed into a prime (111121117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1587410 + ... + 1587479.

It is an arithmetic number, because the mean of its divisors is an integer number (19049340).

Almost surely, 2^111121115 is an apocalyptic number.

111121115 is a deficient number, since it is larger than the sum of its proper divisors (41273605).

111121115 is an equidigital number, since it uses as much as digits as its factorization.

111121115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174901.

The product of its digits is 10, while the sum is 14.

The square root of 111121115 is about 10541.4000493293. The cubic root of 111121115 is about 480.7642844406.

Adding to 111121115 its reverse (511121111), we get a palindrome (622242226).

The spelling of 111121115 in words is "one hundred eleven million, one hundred twenty-one thousand, one hundred fifteen".