111331121 has 8 divisors (see below), whose sum is σ = 122409984. Its totient is φ = 100411920.

The previous prime is 111331117. The next prime is 111331123. The reversal of 111331121 is 121133111.

It is a happy number.

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 111331121 - 2² = 111331117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111331096 and 111331105.

It is not an unprimeable number, because it can be changed into a prime (111331123) 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 7 ways as a sum of consecutive naturals, for example, 38450 + ... + 41243.

It is an arithmetic number, because the mean of its divisors is an integer number (15301248).

Almost surely, 2^111331121 is an apocalyptic number.

111331121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111331121 is a deficient number, since it is larger than the sum of its proper divisors (11078863).

111331121 is a wasteful number, since it uses less digits than its factorization.

111331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79831.

The product of its digits is 18, while the sum is 14.

The square root of 111331121 is about 10551.3563583077. The cubic root of 111331121 is about 481.0669567335.

Adding to 111331121 its reverse (121133111), we get a palindrome (232464232).

The spelling of 111331121 in words is "one hundred eleven million, three hundred thirty-one thousand, one hundred twenty-one".