22120200211221 has 48 divisors (see below), whose sum is σ = 37039985498880. Its totient is φ = 12458789521920.

The previous prime is 22120200211211. The next prime is 22120200211297. The reversal of 22120200211221 is 12211200202122.

It is a happy number.

22120200211221 is a `hidden beast` number, since 2 + 212 + 0 + 20 + 0 + 211 + 221 = 666.

It is not a de Polignac number, because 22120200211221 - 2⁷ = 22120200211093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22120200211194 and 22120200211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120200211211) 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 47 ways as a sum of consecutive naturals, for example, 16314195 + ... + 17617983.

It is an arithmetic number, because the mean of its divisors is an integer number (771666364560).

Almost surely, 2^{22120200211221} is an apocalyptic number.

22120200211221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22120200211221 is a deficient number, since it is larger than the sum of its proper divisors (14919785287659).

22120200211221 is a wasteful number, since it uses less digits than its factorization.

22120200211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307666 (or 1307663 counting only the distinct ones).

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

Adding to 22120200211221 its reverse (12211200202122), we get a palindrome (34331400413343).

Subtracting from 22120200211221 its reverse (12211200202122), we obtain a palindrome (9909000009099).

The spelling of 22120200211221 in words is "twenty-two trillion, one hundred twenty billion, two hundred million, two hundred eleven thousand, two hundred twenty-one".