221100222200111 has 4 divisors (see below), whose sum is σ = 221101930946952. Its totient is φ = 221098513453272.

The previous prime is 221100222200107. The next prime is 221100222200191. The reversal of 221100222200111 is 111002222001122.

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 221100222200111 - 2² = 221100222200107 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 221100222200111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221100222200101) 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, 854179316 + ... + 854438121.

It is an arithmetic number, because the mean of its divisors is an integer number (55275482736738).

Almost surely, 2^{221100222200111} is an apocalyptic number.

221100222200111 is a deficient number, since it is larger than the sum of its proper divisors (1708746841).

221100222200111 is a wasteful number, since it uses less digits than its factorization.

221100222200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708746840.

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

Adding to 221100222200111 its reverse (111002222001122), we get a palindrome (332102444201233).

The spelling of 221100222200111 in words is "two hundred twenty-one trillion, one hundred billion, two hundred twenty-two million, two hundred thousand, one hundred eleven".