201221201022211 has 16 divisors (see below), whose sum is σ = 203907248344800. Its totient is φ = 198548510837760.

The previous prime is 201221201022199. The next prime is 201221201022229. The reversal of 201221201022211 is 112220102122102.

It is a cyclic number.

It is not a de Polignac number, because 201221201022211 - 2⁹ = 201221201021699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201221201023211) 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, 41864265 + ... + 46422613.

It is an arithmetic number, because the mean of its divisors is an integer number (12744203021550).

Almost surely, 2^{201221201022211} is an apocalyptic number.

201221201022211 is a deficient number, since it is larger than the sum of its proper divisors (2686047322589).

201221201022211 is an equidigital number, since it uses as much as digits as its factorization.

201221201022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4559814.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201221201022211 its reverse (112220102122102), we get a palindrome (313441303144313).

The spelling of 201221201022211 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred one million, twenty-two thousand, two hundred eleven".