22112200201221 has 36 divisors (see below), whose sum is σ = 35866702767168. Its totient is φ = 13607507790864.

The previous prime is 22112200201213. The next prime is 22112200201241. The reversal of 22112200201221 is 12210200221122.

It is a happy number.

22112200201221 is a `hidden beast` number, since 2 + 21 + 1 + 220 + 0 + 201 + 221 = 666.

It is not a de Polignac number, because 22112200201221 - 2³ = 22112200201213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22112200201194 and 22112200201203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112200201241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 269179965 + ... + 269262098.

It is an arithmetic number, because the mean of its divisors is an integer number (996297299088).

Almost surely, 2^{22112200201221} is an apocalyptic number.

It is an amenable number.

22112200201221 is a deficient number, since it is larger than the sum of its proper divisors (13754502565947).

22112200201221 is an equidigital number, since it uses as much as digits as its factorization.

22112200201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538442104 (or 538442079 counting only the distinct ones).

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

Adding to 22112200201221 its reverse (12210200221122), we get a palindrome (34322400422343).

The spelling of 22112200201221 in words is "twenty-two trillion, one hundred twelve billion, two hundred million, two hundred one thousand, two hundred twenty-one".