12222020211221 has 16 divisors (see below), whose sum is σ = 12759504030720. Its totient is φ = 11693518573440.

The previous prime is 12222020211173. The next prime is 12222020211241. The reversal of 12222020211221 is 12211202022221.

It is a cyclic number.

It is not a de Polignac number, because 12222020211221 - 2⁶ = 12222020211157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12222020211193 and 12222020211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222020211241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24130640 + ... + 24631926.

It is an arithmetic number, because the mean of its divisors is an integer number (797469001920).

Almost surely, 2^{12222020211221} is an apocalyptic number.

It is an amenable number.

12222020211221 is a deficient number, since it is larger than the sum of its proper divisors (537483819499).

12222020211221 is an equidigital number, since it uses as much as digits as its factorization.

12222020211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510244.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12222020211221 its reverse (12211202022221), we get a palindrome (24433222233442).

The spelling of 12222020211221 in words is "twelve trillion, two hundred twenty-two billion, twenty million, two hundred eleven thousand, two hundred twenty-one".