12221200210221 has 20 divisors (see below), whose sum is σ = 19330264386972. Its totient is φ = 7668204052608.

The previous prime is 12221200210201. The next prime is 12221200210231. The reversal of 12221200210221 is 12201200212221.

It is a happy number.

12221200210221 is a `hidden beast` number, since 1 + 2 + 221 + 200 + 21 + 0 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3673681389225 + 8547518820996 = 1916685^2 + 2923614^2 .

It is not a de Polignac number, because 12221200210221 - 2²⁶ = 12221133101357 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12221200210194 and 12221200210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221200210201) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4437616710 + ... + 4437619463.

Almost surely, 2^{12221200210221} is an apocalyptic number.

It is an amenable number.

12221200210221 is a deficient number, since it is larger than the sum of its proper divisors (7109064176751).

12221200210221 is an equidigital number, since it uses as much as digits as its factorization.

12221200210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8875236202 (or 8875236193 counting only the distinct ones).

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

Adding to 12221200210221 its reverse (12201200212221), we get a palindrome (24422400422442).

The spelling of 12221200210221 in words is "twelve trillion, two hundred twenty-one billion, two hundred million, two hundred ten thousand, two hundred twenty-one".