221211200111 has 4 divisors (see below), whose sum is σ = 241321309224. Its totient is φ = 201101091000.

The previous prime is 221211200107. The next prime is 221211200153. The reversal of 221211200111 is 111002112122.

221211200111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221211200111 - 2² = 221211200107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211200011) 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, 10055054540 + ... + 10055054561.

It is an arithmetic number, because the mean of its divisors is an integer number (60330327306).

Almost surely, 2^221211200111 is an apocalyptic number.

221211200111 is a deficient number, since it is larger than the sum of its proper divisors (20110109113).

221211200111 is a wasteful number, since it uses less digits than its factorization.

221211200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20110109112.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221211200111 its reverse (111002112122), we get a palindrome (332213312233).

The spelling of 221211200111 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred thousand, one hundred eleven".