12000221121 has 8 divisors (see below), whose sum is σ = 18286051264. Its totient is φ = 6857269200.

The previous prime is 12000221099. The next prime is 12000221131. The reversal of 12000221121 is 12112200021.

12000221121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12000221121 - 2³¹ = 9852737473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12000221097 and 12000221106.

It is not an unprimeable number, because it can be changed into a prime (12000221131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285719530 + ... + 285719571.

It is an arithmetic number, because the mean of its divisors is an integer number (2285756408).

Almost surely, 2^12000221121 is an apocalyptic number.

It is an amenable number.

12000221121 is a deficient number, since it is larger than the sum of its proper divisors (6285830143).

12000221121 is an equidigital number, since it uses as much as digits as its factorization.

12000221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571439111.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12000221121 its reverse (12112200021), we get a palindrome (24112421142).

The spelling of 12000221121 in words is "twelve billion, two hundred twenty-one thousand, one hundred twenty-one".