111204121 has 16 divisors (see below), whose sum is σ = 130072576. Its totient is φ = 93105936.

The previous prime is 111204073. The next prime is 111204139. The reversal of 111204121 is 121402111.

It is not a de Polignac number, because 111204121 - 2⁷ = 111203993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111204151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58630 + ... + 60496.

It is an arithmetic number, because the mean of its divisors is an integer number (8129536).

Almost surely, 2^111204121 is an apocalyptic number.

It is an amenable number.

111204121 is a deficient number, since it is larger than the sum of its proper divisors (18868455).

111204121 is a wasteful number, since it uses less digits than its factorization.

111204121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 111204121 is about 10545.3364574109. The cubic root of 111204121 is about 480.8839628288.

Adding to 111204121 its reverse (121402111), we get a palindrome (232606232).

The spelling of 111204121 in words is "one hundred eleven million, two hundred four thousand, one hundred twenty-one".