12122120210221 has 32 divisors (see below), whose sum is σ = 14113624025088. Its totient is φ = 10197250764480.

The previous prime is 12122120210209. The next prime is 12122120210227. The reversal of 12122120210221 is 12201202122121.

12122120210221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12122120210221 - 2⁹ = 12122120209709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122120210227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 419857416 + ... + 419886286.

It is an arithmetic number, because the mean of its divisors is an integer number (441050750784).

Almost surely, 2^{12122120210221} is an apocalyptic number.

It is an amenable number.

12122120210221 is a deficient number, since it is larger than the sum of its proper divisors (1991503814867).

12122120210221 is a wasteful number, since it uses less digits than its factorization.

12122120210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33721.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12122120210221 its reverse (12201202122121), we get a palindrome (24323322332342).

The spelling of 12122120210221 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty million, two hundred ten thousand, two hundred twenty-one".