111234121 has 4 divisors (see below), whose sum is σ = 113332932. Its totient is φ = 109135312.

The previous prime is 111234119. The next prime is 111234143. The reversal of 111234121 is 121432111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52925625 + 58308496 = 7275^2 + 7636^2 .

It is a cyclic number.

It is not a de Polignac number, because 111234121 - 2¹ = 111234119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111234095 and 111234104.

It is not an unprimeable number, because it can be changed into a prime (111234521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049326 + ... + 1049431.

It is an arithmetic number, because the mean of its divisors is an integer number (28333233).

Almost surely, 2^111234121 is an apocalyptic number.

It is an amenable number.

111234121 is a deficient number, since it is larger than the sum of its proper divisors (2098811).

111234121 is an equidigital number, since it uses as much as digits as its factorization.

111234121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098810.

The product of its digits is 48, while the sum is 16.

The square root of 111234121 is about 10546.7587912116. The cubic root of 111234121 is about 480.9272022989.

Adding to 111234121 its reverse (121432111), we get a palindrome (232666232).

The spelling of 111234121 in words is "one hundred eleven million, two hundred thirty-four thousand, one hundred twenty-one".