21222021102201 has 10 divisors (see below), whose sum is σ = 31702031523162. Its totient is φ = 14148014068080.

The previous prime is 21222021102193. The next prime is 21222021102281. The reversal of 21222021102201 is 10220112022212.

It is a happy number.

21222021102201 is a `hidden beast` number, since 2 + 12 + 220 + 211 + 0 + 220 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20141928576576 + 1080092525625 = 4487976^2 + 1039275^2 .

It is not a de Polignac number, because 21222021102201 - 2³ = 21222021102193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222021102281) 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 9 ways as a sum of consecutive naturals, for example, 131000130180 + ... + 131000130341.

Almost surely, 2^{21222021102201} is an apocalyptic number.

It is an amenable number.

21222021102201 is a deficient number, since it is larger than the sum of its proper divisors (10480010420961).

21222021102201 is an equidigital number, since it uses as much as digits as its factorization.

21222021102201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262000260533 (or 262000260524 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21222021102201 its reverse (10220112022212), we get a palindrome (31442133124413).

The spelling of 21222021102201 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, one hundred two thousand, two hundred one".