12204320221 has 4 divisors (see below), whose sum is σ = 12205033600. Its totient is φ = 12203606844.

The previous prime is 12204320209. The next prime is 12204320231. The reversal of 12204320221 is 12202340221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12204320221 is a prime.

It is a super-3 number, since 3×12204320221³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12204320231) 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, 330381 + ... + 365458.

It is an arithmetic number, because the mean of its divisors is an integer number (3051258400).

Almost surely, 2^12204320221 is an apocalyptic number.

It is an amenable number.

12204320221 is a deficient number, since it is larger than the sum of its proper divisors (713379).

12204320221 is an equidigital number, since it uses as much as digits as its factorization.

12204320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713378.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 12204320221 its reverse (12202340221), we get a palindrome (24406660442).

The spelling of 12204320221 in words is "twelve billion, two hundred four million, three hundred twenty thousand, two hundred twenty-one".