12000201221 has 4 divisors (see below), whose sum is σ = 12279275712. Its totient is φ = 11721126732.

The previous prime is 12000201209. The next prime is 12000201259. The reversal of 12000201221 is 12210200021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12210200021 = 389 ⋅31388689.

It is a cyclic number.

It is not a de Polignac number, because 12000201221 - 2¹⁴ = 12000184837 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 (12000201721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139537181 + ... + 139537266.

It is an arithmetic number, because the mean of its divisors is an integer number (3069818928).

Almost surely, 2^12000201221 is an apocalyptic number.

It is an amenable number.

12000201221 is a deficient number, since it is larger than the sum of its proper divisors (279074491).

12000201221 is an equidigital number, since it uses as much as digits as its factorization.

12000201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279074490.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12000201221 its reverse (12210200021), we get a palindrome (24210401242).

The spelling of 12000201221 in words is "twelve billion, two hundred one thousand, two hundred twenty-one".