12043214221 has 16 divisors (see below), whose sum is σ = 12806080560. Its totient is φ = 11307412480.

The previous prime is 12043214213. The next prime is 12043214237. The reversal of 12043214221 is 12241234021.

It can be written as a sum of positive squares in 8 ways, for example, as 1214522500 + 10828691721 = 34850^2 + 104061^2 .

It is a cyclic number.

It is not a de Polignac number, because 12043214221 - 2³ = 12043214213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12043214192 and 12043214201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12043214251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139011 + ... + 208351.

It is an arithmetic number, because the mean of its divisors is an integer number (800380035).

Almost surely, 2^12043214221 is an apocalyptic number.

It is an amenable number.

12043214221 is a deficient number, since it is larger than the sum of its proper divisors (762866339).

12043214221 is a wasteful number, since it uses less digits than its factorization.

12043214221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69536.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 12043214221 its reverse (12241234021), we get a palindrome (24284448242).

The spelling of 12043214221 in words is "twelve billion, forty-three million, two hundred fourteen thousand, two hundred twenty-one".