12102210211221 has 96 divisors (see below), whose sum is σ = 19591569728640. Its totient is φ = 7379868787200.

The previous prime is 12102210211199. The next prime is 12102210211241. The reversal of 12102210211221 is 12211201220121.

12102210211221 is a `hidden beast` number, since 1 + 2 + 10 + 221 + 0 + 211 + 221 = 666.

It is not a de Polignac number, because 12102210211221 - 2¹⁰ = 12102210210197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12102210211194 and 12102210211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102210211241) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 232052670 + ... + 232104816.

It is an arithmetic number, because the mean of its divisors is an integer number (204078851340).

Almost surely, 2^{12102210211221} is an apocalyptic number.

It is an amenable number.

12102210211221 is a deficient number, since it is larger than the sum of its proper divisors (7489359517419).

12102210211221 is a wasteful number, since it uses less digits than its factorization.

12102210211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52644 (or 52625 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12102210211221 its reverse (12211201220121), we get a palindrome (24313411431342).

The spelling of 12102210211221 in words is "twelve trillion, one hundred two billion, two hundred ten million, two hundred eleven thousand, two hundred twenty-one".