21222002022201 has 12 divisors (see below), whose sum is σ = 30661427048980. Its totient is φ = 14144574827520.

The previous prime is 21222002022167. The next prime is 21222002022253. The reversal of 21222002022201 is 10222020022212.

21222002022201 is a `hidden beast` number, since 21 + 2 + 220 + 0 + 202 + 220 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17264448812601 + 3957553209600 = 4155051^2 + 1989360^2 .

It is not a de Polignac number, because 21222002022201 - 2¹⁰ = 21222002021177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222002020201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285504160 + ... + 285578481.

Almost surely, 2^{21222002022201} is an apocalyptic number.

It is an amenable number.

21222002022201 is a deficient number, since it is larger than the sum of its proper divisors (9439425026779).

21222002022201 is a wasteful number, since it uses less digits than its factorization.

21222002022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571086776 (or 571086773 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21222002022201 its reverse (10222020022212), we get a palindrome (31444022044413).

The spelling of 21222002022201 in words is "twenty-one trillion, two hundred twenty-two billion, two million, twenty-two thousand, two hundred one".