111200201212121 has 16 divisors (see below), whose sum is σ = 135386421273600. Its totient is φ = 89209981142928.

The previous prime is 111200201212039. The next prime is 111200201212129. The reversal of 111200201212121 is 121212102002111.

It is a cyclic number.

It is not a de Polignac number, because 111200201212121 - 2¹⁴ = 111200201195737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111200201212121.

It is not an unprimeable number, because it can be changed into a prime (111200201212129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5036686181 + ... + 5036708258.

It is an arithmetic number, because the mean of its divisors is an integer number (8461651329600).

Almost surely, 2^{111200201212121} is an apocalyptic number.

It is an amenable number.

111200201212121 is a deficient number, since it is larger than the sum of its proper divisors (24186220061479).

111200201212121 is a wasteful number, since it uses less digits than its factorization.

111200201212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10073394548.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111200201212121 its reverse (121212102002111), we get a palindrome (232412303214232).

The spelling of 111200201212121 in words is "one hundred eleven trillion, two hundred billion, two hundred one million, two hundred twelve thousand, one hundred twenty-one".