121210022212221 has 16 divisors (see below), whose sum is σ = 162000127477440. Its totient is φ = 80613301718400.

The previous prime is 121210022212157. The next prime is 121210022212231. The reversal of 121210022212221 is 122212220012121.

It is not a de Polignac number, because 121210022212221 - 2⁶ = 121210022212157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210022212231) 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, 341979531 + ... + 342333783.

It is an arithmetic number, because the mean of its divisors is an integer number (10125007967340).

Almost surely, 2^{121210022212221} is an apocalyptic number.

It is an amenable number.

121210022212221 is a deficient number, since it is larger than the sum of its proper divisors (40790105265219).

121210022212221 is a wasteful number, since it uses less digits than its factorization.

121210022212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626876.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121210022212221 its reverse (122212220012121), we get a palindrome (243422242224342).

The spelling of 121210022212221 in words is "one hundred twenty-one trillion, two hundred ten billion, twenty-two million, two hundred twelve thousand, two hundred twenty-one".