221021221010211 has 48 divisors (see below), whose sum is σ = 330730824985600. Its totient is φ = 142084034124480.

The previous prime is 221021221010159. The next prime is 221021221010299. The reversal of 221021221010211 is 112010122120122.

221021221010211 is a `hidden beast` number, since 2 + 21 + 0 + 212 + 210 + 10 + 211 = 666.

It is not a de Polignac number, because 221021221010211 - 2¹⁰ = 221021221009187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221021221010111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2248409340 + ... + 2248507638.

Almost surely, 2^{221021221010211} is an apocalyptic number.

221021221010211 is a deficient number, since it is larger than the sum of its proper divisors (109709603975389).

221021221010211 is a wasteful number, since it uses less digits than its factorization.

221021221010211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127096 (or 127093 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221021221010211 its reverse (112010122120122), we get a palindrome (333031343130333).

The spelling of 221021221010211 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty-one million, ten thousand, two hundred eleven".