111225244121 has 4 divisors (see below), whose sum is σ = 111379939200. Its totient is φ = 111070549044.

The previous prime is 111225244099. The next prime is 111225244133. The reversal of 111225244121 is 121442522111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111225244121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111225244181) 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 3 ways as a sum of consecutive naturals, for example, 77346461 + ... + 77347898.

It is an arithmetic number, because the mean of its divisors is an integer number (27844984800).

Almost surely, 2^111225244121 is an apocalyptic number.

It is an amenable number.

111225244121 is a deficient number, since it is larger than the sum of its proper divisors (154695079).

111225244121 is an equidigital number, since it uses as much as digits as its factorization.

111225244121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154695078.

The product of its digits is 1280, while the sum is 26.

Adding to 111225244121 its reverse (121442522111), we get a palindrome (232667766232).

The spelling of 111225244121 in words is "one hundred eleven billion, two hundred twenty-five million, two hundred forty-four thousand, one hundred twenty-one".