12135196221 has 16 divisors (see below), whose sum is σ = 17033175936. Its totient is φ = 7669899776.

The previous prime is 12135196219. The next prime is 12135196231. The reversal of 12135196221 is 12269153121.

It is a happy number.

12135196221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12135196221 - 2¹ = 12135196219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12135196231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 770400 + ... + 785993.

It is an arithmetic number, because the mean of its divisors is an integer number (1064573496).

Almost surely, 2^12135196221 is an apocalyptic number.

It is an amenable number.

12135196221 is a deficient number, since it is larger than the sum of its proper divisors (4897979715).

12135196221 is a wasteful number, since it uses less digits than its factorization.

12135196221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556532.

The product of its digits is 6480, while the sum is 33.

The spelling of 12135196221 in words is "twelve billion, one hundred thirty-five million, one hundred ninety-six thousand, two hundred twenty-one".