12204342221 has 8 divisors (see below), whose sum is σ = 12231420984. Its totient is φ = 12177285120.

The previous prime is 12204342191. The next prime is 12204342239. The reversal of 12204342221 is 12224340221.

It can be written as a sum of positive squares in 4 ways, for example, as 3751562500 + 8452779721 = 61250^2 + 91939^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12204342221 - 2²⁶ = 12137233357 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 (12204344221) 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, 1647101 + ... + 1654493.

It is an arithmetic number, because the mean of its divisors is an integer number (1528927623).

Almost surely, 2^12204342221 is an apocalyptic number.

It is an amenable number.

12204342221 is a deficient number, since it is larger than the sum of its proper divisors (27078763).

12204342221 is an equidigital number, since it uses as much as digits as its factorization.

12204342221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10831.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12204342221 its reverse (12224340221), we get a palindrome (24428682442).

The spelling of 12204342221 in words is "twelve billion, two hundred four million, three hundred forty-two thousand, two hundred twenty-one".