221200222122211 has 4 divisors (see below), whose sum is σ = 221237542901232. Its totient is φ = 221162901343192.

The previous prime is 221200222122203. The next prime is 221200222122221. The reversal of 221200222122211 is 112221222002122.

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 221200222122211 - 2³ = 221200222122203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221200222122221) 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, 18660380620 + ... + 18660392473.

It is an arithmetic number, because the mean of its divisors is an integer number (55309385725308).

Almost surely, 2^{221200222122211} is an apocalyptic number.

221200222122211 is a deficient number, since it is larger than the sum of its proper divisors (37320779021).

221200222122211 is an equidigital number, since it uses as much as digits as its factorization.

221200222122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37320779020.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221200222122211 its reverse (112221222002122), we get a palindrome (333421444124333).

The spelling of 221200222122211 in words is "two hundred twenty-one trillion, two hundred billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred eleven".