12012043121 has 8 divisors (see below), whose sum is σ = 12937063104. Its totient is φ = 11087168400.

The previous prime is 12012043093. The next prime is 12012043151. The reversal of 12012043121 is 12134021021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012043121 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 12012043121.

It is not an unprimeable number, because it can be changed into a prime (12012043151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185780 + ... + 241946.

It is an arithmetic number, because the mean of its divisors is an integer number (1617132888).

Almost surely, 2^12012043121 is an apocalyptic number.

It is an amenable number.

12012043121 is a deficient number, since it is larger than the sum of its proper divisors (925019983).

12012043121 is a wasteful number, since it uses less digits than its factorization.

12012043121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72631.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12012043121 its reverse (12134021021), we get a palindrome (24146064142).

The spelling of 12012043121 in words is "twelve billion, twelve million, forty-three thousand, one hundred twenty-one".