12133201221221 has 16 divisors (see below), whose sum is σ = 12805474862400. Its totient is φ = 11464331977728.

The previous prime is 12133201221187. The next prime is 12133201221287. The reversal of 12133201221221 is 12212210233121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12133201221221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12133201227221) 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, 11658986 + ... + 12656948.

It is an arithmetic number, because the mean of its divisors is an integer number (800342178900).

Almost surely, 2^{12133201221221} is an apocalyptic number.

It is an amenable number.

12133201221221 is a deficient number, since it is larger than the sum of its proper divisors (672273641179).

12133201221221 is a wasteful number, since it uses less digits than its factorization.

12133201221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999668.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 12133201221221 its reverse (12212210233121), we get a palindrome (24345411454342).

The spelling of 12133201221221 in words is "twelve trillion, one hundred thirty-three billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty-one".