12000203221 has 4 divisors (see below), whose sum is σ = 12007226700. Its totient is φ = 11993179744.

The previous prime is 12000203209. The next prime is 12000203227. The reversal of 12000203221 is 12230200021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 872907025 + 11127296196 = 29545^2 + 105486^2 .

It is a cyclic number.

It is not a de Polignac number, because 12000203221 - 2⁷ = 12000203093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000203227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3509176 + ... + 3512593.

It is an arithmetic number, because the mean of its divisors is an integer number (3001806675).

Almost surely, 2^12000203221 is an apocalyptic number.

It is an amenable number.

12000203221 is a deficient number, since it is larger than the sum of its proper divisors (7023479).

12000203221 is an equidigital number, since it uses as much as digits as its factorization.

12000203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7023478.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 12000203221 its reverse (12230200021), we get a palindrome (24230403242).

The spelling of 12000203221 in words is "twelve billion, two hundred three thousand, two hundred twenty-one".