111121375 has 16 divisors (see below), whose sum is σ = 139924512. Its totient is φ = 88099200.

The previous prime is 111121363. The next prime is 111121379. The reversal of 111121375 is 573121111.

It is not a de Polignac number, because 111121375 - 2⁵ = 111121343 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 (111121379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10192 + ... + 18058.

It is an arithmetic number, because the mean of its divisors is an integer number (8745282).

Almost surely, 2^111121375 is an apocalyptic number.

111121375 is a deficient number, since it is larger than the sum of its proper divisors (28803137).

111121375 is an equidigital number, since it uses as much as digits as its factorization.

111121375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7995 (or 7985 counting only the distinct ones).

The product of its digits is 210, while the sum is 22.

The square root of 111121375 is about 10541.4123816498. The cubic root of 111121375 is about 480.7646594027.

Adding to 111121375 its reverse (573121111), we get a palindrome (684242486).

The spelling of 111121375 in words is "one hundred eleven million, one hundred twenty-one thousand, three hundred seventy-five".