12111201221201 has 4 divisors (see below), whose sum is σ = 12119712256512. Its totient is φ = 12102690185892.

The previous prime is 12111201221173. The next prime is 12111201221221. The reversal of 12111201221201 is 10212210211121.

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.

It is a cyclic number.

It is not a de Polignac number, because 12111201221201 - 2⁶ = 12111201221137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12111201221201.

It is not an unprimeable number, because it can be changed into a prime (12111201221221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4255515521 + ... + 4255518366.

It is an arithmetic number, because the mean of its divisors is an integer number (3029928064128).

Almost surely, 2^{12111201221201} is an apocalyptic number.

It is an amenable number.

12111201221201 is a deficient number, since it is larger than the sum of its proper divisors (8511035311).

12111201221201 is an equidigital number, since it uses as much as digits as its factorization.

12111201221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8511035310.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12111201221201 its reverse (10212210211121), we get a palindrome (22323411432322).

The spelling of 12111201221201 in words is "twelve trillion, one hundred eleven billion, two hundred one million, two hundred twenty-one thousand, two hundred one".