22210100212221 has 12 divisors (see below), whose sum is σ = 32086740851100. Its totient is φ = 14804201941440.

The previous prime is 22210100212187. The next prime is 22210100212229. The reversal of 22210100212221 is 12221200101222.

It is a happy number.

22210100212221 is a `hidden beast` number, since 2 + 221 + 0 + 10 + 0 + 212 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12575967080121 + 9634133132100 = 3546261^2 + 3103890^2 .

It is not a de Polignac number, because 22210100212221 - 2¹¹ = 22210100210173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22210100212194 and 22210100212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210100212229) 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, 210905550 + ... + 211010831.

It is an arithmetic number, because the mean of its divisors is an integer number (2673895070925).

Almost surely, 2^{22210100212221} is an apocalyptic number.

It is an amenable number.

22210100212221 is a deficient number, since it is larger than the sum of its proper divisors (9876640638879).

22210100212221 is a wasteful number, since it uses less digits than its factorization.

22210100212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421922236 (or 421922233 counting only the distinct ones).

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

Adding to 22210100212221 its reverse (12221200101222), we get a palindrome (34431300313443).

The spelling of 22210100212221 in words is "twenty-two trillion, two hundred ten billion, one hundred million, two hundred twelve thousand, two hundred twenty-one".