111001121 has 24 divisors (see below), whose sum is σ = 142326720. Its totient is φ = 85596000.

The previous prime is 111001117. The next prime is 111001139. The reversal of 111001121 is 121100111.

It is a happy number.

It is not a de Polignac number, because 111001121 - 2² = 111001117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111001099 and 111001108.

It is not an unprimeable number, because it can be changed into a prime (111001171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53420 + ... + 55458.

It is an arithmetic number, because the mean of its divisors is an integer number (5930280).

Almost surely, 2^111001121 is an apocalyptic number.

111001121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111001121 is a deficient number, since it is larger than the sum of its proper divisors (31325599).

111001121 is a wasteful number, since it uses less digits than its factorization.

111001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165 (or 2158 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 111001121 is about 10535.7069530241. The cubic root of 111001121 is about 480.5911712056.

Adding to 111001121 its reverse (121100111), we get a palindrome (232101232).

It can be divided in two parts, 11100 and 1121, that added together give a palindrome (12221).

The spelling of 111001121 in words is "one hundred eleven million, one thousand, one hundred twenty-one".