12102021301221 has 12 divisors (see below), whose sum is σ = 17484799977580. Its totient is φ = 8066120719680.

The previous prime is 12102021301219. The next prime is 12102021301229. The reversal of 12102021301221 is 12210312020121.

12102021301221 is a `hidden beast` number, since 1 + 210 + 20 + 213 + 0 + 1 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8185635713025 + 3916385588196 = 2861055^2 + 1978986^2 .

It is not a de Polignac number, because 12102021301221 - 2¹ = 12102021301219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12102021301194 and 12102021301203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102021301229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157749616 + ... + 157826313.

Almost surely, 2^{12102021301221} is an apocalyptic number.

It is an amenable number.

12102021301221 is a deficient number, since it is larger than the sum of its proper divisors (5382778676359).

12102021301221 is a wasteful number, since it uses less digits than its factorization.

12102021301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315580196 (or 315580193 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 12102021301221 its reverse (12210312020121), we get a palindrome (24312333321342).

The spelling of 12102021301221 in words is "twelve trillion, one hundred two billion, twenty-one million, three hundred one thousand, two hundred twenty-one".