12120012010221 has 16 divisors (see below), whose sum is σ = 17215489482240. Its totient is φ = 7562518588080.

The previous prime is 12120012010163. The next prime is 12120012010283. The reversal of 12120012010221 is 12201021002121.

It is not a de Polignac number, because 12120012010221 - 2⁶ = 12120012010157 is a prime.

It is a super-2 number, since 2×12120012010221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12120012010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120012010291) 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, 1280909665 + ... + 1280919126.

It is an arithmetic number, because the mean of its divisors is an integer number (1075968092640).

Almost surely, 2^{12120012010221} is an apocalyptic number.

It is an amenable number.

12120012010221 is a deficient number, since it is larger than the sum of its proper divisors (5095477472019).

12120012010221 is a wasteful number, since it uses less digits than its factorization.

12120012010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561828896.

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

Adding to 12120012010221 its reverse (12201021002121), we get a palindrome (24321033012342).

The spelling of 12120012010221 in words is "twelve trillion, one hundred twenty billion, twelve million, ten thousand, two hundred twenty-one".