21222201102201 has 12 divisors (see below), whose sum is σ = 33441044161200. Its totient is φ = 12861940061880.

The previous prime is 21222201102139. The next prime is 21222201102209. The reversal of 21222201102201 is 10220110222212.

It is a happy number.

21222201102201 is a `hidden beast` number, since 21 + 222 + 201 + 1 + 0 + 220 + 1 = 666.

It is not a de Polignac number, because 21222201102201 - 2¹⁷ = 21222200971129 is a prime.

It is a super-2 number, since 2×21222201102201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21222201102209) 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 11 ways as a sum of consecutive naturals, for example, 107182833751 + ... + 107182833948.

It is an arithmetic number, because the mean of its divisors is an integer number (2786753680100).

Almost surely, 2^{21222201102201} is an apocalyptic number.

It is an amenable number.

21222201102201 is a deficient number, since it is larger than the sum of its proper divisors (12218843058999).

21222201102201 is a wasteful number, since it uses less digits than its factorization.

21222201102201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214365667716 (or 214365667713 counting only the distinct ones).

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

Adding to 21222201102201 its reverse (10220110222212), we get a palindrome (31442311324413).

It can be divided in two parts, 21 and 222201102201, that added together give a palindrome (222201102222).

The spelling of 21222201102201 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred one million, one hundred two thousand, two hundred one".