12001201121 has 16 divisors (see below), whose sum is σ = 15049407744. Its totient is φ = 9316292544.

The previous prime is 12001201111. The next prime is 12001201127. The reversal of 12001201121 is 12110210021.

It is not a de Polignac number, because 12001201121 - 2¹⁸ = 12000938977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12001201127) 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, 1239341 + ... + 1248986.

It is an arithmetic number, because the mean of its divisors is an integer number (940587984).

Almost surely, 2^12001201121 is an apocalyptic number.

It is an amenable number.

12001201121 is a deficient number, since it is larger than the sum of its proper divisors (3048206623).

12001201121 is a wasteful number, since it uses less digits than its factorization.

12001201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488400.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12001201121 its reverse (12110210021), we get a palindrome (24111411142).

The spelling of 12001201121 in words is "twelve billion, one million, two hundred one thousand, one hundred twenty-one".