12021012210221 has 16 divisors (see below), whose sum is σ = 13910625857664. Its totient is φ = 10175285375424.

The previous prime is 12021012210071. The next prime is 12021012210223. The reversal of 12021012210221 is 12201221012021.

It is a cyclic number.

It is not a de Polignac number, because 12021012210221 - 2¹⁰ = 12021012209197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12021012210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021012210223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33373430 + ... + 33731703.

It is an arithmetic number, because the mean of its divisors is an integer number (869414116104).

Almost surely, 2^{12021012210221} is an apocalyptic number.

It is an amenable number.

12021012210221 is a deficient number, since it is larger than the sum of its proper divisors (1889613647443).

12021012210221 is a wasteful number, since it uses less digits than its factorization.

12021012210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67105460.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021012210221 its reverse (12201221012021), we get a palindrome (24222233222242).

The spelling of 12021012210221 in words is "twelve trillion, twenty-one billion, twelve million, two hundred ten thousand, two hundred twenty-one".