111111200111121 has 16 divisors (see below), whose sum is σ = 179271852280704. Its totient is φ = 59757284093184.

The previous prime is 111111200111117. The next prime is 111111200111203. The reversal of 111111200111121 is 121111002111111.

It is a happy number.

It is not a de Polignac number, because 111111200111121 - 2² = 111111200111117 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111111200111121.

It is not an unprimeable number, because it can be changed into a prime (111111200111101) 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 15 ways as a sum of consecutive naturals, for example, 155617926970 + ... + 155617927683.

It is an arithmetic number, because the mean of its divisors is an integer number (11204490767544).

Almost surely, 2^{111111200111121} is an apocalyptic number.

It is an amenable number.

111111200111121 is a deficient number, since it is larger than the sum of its proper divisors (68160652169583).

111111200111121 is a wasteful number, since it uses less digits than its factorization.

111111200111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311235854680.

The product of its (nonzero) digits is 4, while the sum is 15.

Adding to 111111200111121 its reverse (121111002111111), we get a palindrome (232222202222232).

The spelling of 111111200111121 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred million, one hundred eleven thousand, one hundred twenty-one".