111200000121 has 64 divisors (see below), whose sum is σ = 189972787200. Its totient is φ = 62971509888.

The previous prime is 111200000111. The next prime is 111200000147. The reversal of 111200000121 is 121000002111.

It is a happy number.

It is not a de Polignac number, because 111200000121 - 2¹¹ = 111199998073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (111200000101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16645860 + ... + 16652538.

It is an arithmetic number, because the mean of its divisors is an integer number (2968324800).

Almost surely, 2^111200000121 is an apocalyptic number.

It is an amenable number.

111200000121 is a deficient number, since it is larger than the sum of its proper divisors (78772787079).

111200000121 is a wasteful number, since it uses less digits than its factorization.

111200000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7475 (or 7469 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 111200000121 its reverse (121000002111), we get a palindrome (232200002232).

The spelling of 111200000121 in words is "one hundred eleven billion, two hundred million, one hundred twenty-one", and thus it is an aban number.