12102210001221 has 16 divisors (see below), whose sum is σ = 16693498565760. Its totient is φ = 7789557222720.

The previous prime is 12102210001207. The next prime is 12102210001229. The reversal of 12102210001221 is 12210001220121.

It is not a de Polignac number, because 12102210001221 - 2⁹ = 12102210000709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12102210001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102210001229) 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, 1470145 + ... + 5134758.

It is an arithmetic number, because the mean of its divisors is an integer number (1043343660360).

Almost surely, 2^{12102210001221} is an apocalyptic number.

It is an amenable number.

12102210001221 is a deficient number, since it is larger than the sum of its proper divisors (4591288564539).

12102210001221 is a wasteful number, since it uses less digits than its factorization.

12102210001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6625996.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12102210001221 its reverse (12210001220121), we get a palindrome (24312211221342).

The spelling of 12102210001221 in words is "twelve trillion, one hundred two billion, two hundred ten million, one thousand, two hundred twenty-one".