12001221111201 has 16 divisors (see below), whose sum is σ = 19250078976000. Its totient is φ = 6496901653968.

The previous prime is 12001221111149. The next prime is 12001221111203. The reversal of 12001221111201 is 10211112210021.

It is a happy number.

It is not a de Polignac number, because 12001221111201 - 2⁷ = 12001221111073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12001221111203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15039123801 + ... + 15039124598.

It is an arithmetic number, because the mean of its divisors is an integer number (1203129936000).

Almost surely, 2^{12001221111201} is an apocalyptic number.

It is an amenable number.

12001221111201 is a deficient number, since it is larger than the sum of its proper divisors (7248857864799).

12001221111201 is a wasteful number, since it uses less digits than its factorization.

12001221111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30078248428.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12001221111201 its reverse (10211112210021), we get a palindrome (22212333321222).

The spelling of 12001221111201 in words is "twelve trillion, one billion, two hundred twenty-one million, one hundred eleven thousand, two hundred one".