12201000221 has 4 divisors (see below), whose sum is σ = 12268409244. Its totient is φ = 12133591200.

The previous prime is 12201000193. The next prime is 12201000223. The reversal of 12201000221 is 12200010221.

It is a happy number.

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 526197721 + 11674802500 = 22939^2 + 108050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12201000221 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 (12201000223) 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, 33704240 + ... + 33704601.

It is an arithmetic number, because the mean of its divisors is an integer number (3067102311).

Almost surely, 2^12201000221 is an apocalyptic number.

It is an amenable number.

12201000221 is a deficient number, since it is larger than the sum of its proper divisors (67409023).

12201000221 is an equidigital number, since it uses as much as digits as its factorization.

12201000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67409022.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12201000221 its reverse (12200010221), we get a palindrome (24401010442).

The spelling of 12201000221 in words is "twelve billion, two hundred one million, two hundred twenty-one", and thus it is an aban number.