12201002221 has 4 divisors (see below), whose sum is σ = 12918708252. Its totient is φ = 11483296192.

The previous prime is 12201002213. The next prime is 12201002239. The reversal of 12201002221 is 12220010221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12220010221 = 107 ⋅114205703.

It can be written as a sum of positive squares in 2 ways, for example, as 9194124996 + 3006877225 = 95886^2 + 54835^2 .

It is a cyclic number.

It is not a de Polignac number, because 12201002221 - 2³ = 12201002213 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 (12201002201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358852990 + ... + 358853023.

It is an arithmetic number, because the mean of its divisors is an integer number (3229677063).

Almost surely, 2^12201002221 is an apocalyptic number.

It is an amenable number.

12201002221 is a deficient number, since it is larger than the sum of its proper divisors (717706031).

12201002221 is an equidigital number, since it uses as much as digits as its factorization.

12201002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717706030.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12201002221 its reverse (12220010221), we get a palindrome (24421012442).

The spelling of 12201002221 in words is "twelve billion, two hundred one million, two thousand, two hundred twenty-one".