221201220211 has 8 divisors (see below), whose sum is σ = 244396233504. Its totient is φ = 199137671040.

The previous prime is 221201220203. The next prime is 221201220217. The reversal of 221201220211 is 112022102122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221201220211 - 2³ = 221201220203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221201220217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282865620 + ... + 282866401.

It is an arithmetic number, because the mean of its divisors is an integer number (30549529188).

Almost surely, 2^221201220211 is an apocalyptic number.

221201220211 is a deficient number, since it is larger than the sum of its proper divisors (23195013293).

221201220211 is a wasteful number, since it uses less digits than its factorization.

221201220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565732061.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221201220211 its reverse (112022102122), we get a palindrome (333223322333).

The spelling of 221201220211 in words is "two hundred twenty-one billion, two hundred one million, two hundred twenty thousand, two hundred eleven".