111224200121 has 4 divisors (see below), whose sum is σ = 113590672512. Its totient is φ = 108857727732.

The previous prime is 111224200117. The next prime is 111224200181. The reversal of 111224200121 is 121002422111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121002422111 = 383 ⋅315933217.

It is a cyclic number.

It is not a de Polignac number, because 111224200121 - 2² = 111224200117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111224200121.

It is not an unprimeable number, because it can be changed into a prime (111224200181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1183236125 + ... + 1183236218.

It is an arithmetic number, because the mean of its divisors is an integer number (28397668128).

Almost surely, 2^111224200121 is an apocalyptic number.

It is an amenable number.

111224200121 is a deficient number, since it is larger than the sum of its proper divisors (2366472391).

111224200121 is an equidigital number, since it uses as much as digits as its factorization.

111224200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366472390.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111224200121 its reverse (121002422111), we get a palindrome (232226622232).

The spelling of 111224200121 in words is "one hundred eleven billion, two hundred twenty-four million, two hundred thousand, one hundred twenty-one".