12012102102221 has 16 divisors (see below), whose sum is σ = 13245671013120. Its totient is φ = 10825788637440.

The previous prime is 12012102102181. The next prime is 12012102102229. The reversal of 12012102102221 is 12220120121021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012102102221 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12012102102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012102102229) 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, 63080636 + ... + 63270773.

It is an arithmetic number, because the mean of its divisors is an integer number (827854438320).

Almost surely, 2^{12012102102221} is an apocalyptic number.

It is an amenable number.

12012102102221 is a deficient number, since it is larger than the sum of its proper divisors (1233568910899).

12012102102221 is a wasteful number, since it uses less digits than its factorization.

12012102102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126351596.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12012102102221 its reverse (12220120121021), we get a palindrome (24232222223242).

The spelling of 12012102102221 in words is "twelve trillion, twelve billion, one hundred two million, one hundred two thousand, two hundred twenty-one".