12012211210221 has 24 divisors (see below), whose sum is σ = 17821635686400. Its totient is φ = 7790953048416.

The previous prime is 12012211210201. The next prime is 12012211210271. The reversal of 12012211210221 is 12201211221021.

12012211210221 is a `hidden beast` number, since 1 + 20 + 1 + 2 + 211 + 210 + 221 = 666.

It is not a de Polignac number, because 12012211210221 - 2¹⁰ = 12012211209197 is a prime.

It is a super-2 number, since 2×12012211210221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12012211210194 and 12012211210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012211210201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1728436 + ... + 5197298.

It is an arithmetic number, because the mean of its divisors is an integer number (742568153600).

Almost surely, 2^{12012211210221} is an apocalyptic number.

It is an amenable number.

12012211210221 is a deficient number, since it is larger than the sum of its proper divisors (5809424476179).

12012211210221 is a wasteful number, since it uses less digits than its factorization.

12012211210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479305 (or 3479302 counting only the distinct ones).

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

Adding to 12012211210221 its reverse (12201211221021), we get a palindrome (24213422431242).

The spelling of 12012211210221 in words is "twelve trillion, twelve billion, two hundred eleven million, two hundred ten thousand, two hundred twenty-one".