12201020221 has 16 divisors (see below), whose sum is σ = 13965427840. Its totient is φ = 10566106560.

The previous prime is 12201020203. The next prime is 12201020233. The reversal of 12201020221 is 12202010221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12201020221 - 2⁷ = 12201020093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201020521) 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, 214350 + ... + 265231.

It is an arithmetic number, because the mean of its divisors is an integer number (872839240).

Almost surely, 2^12201020221 is an apocalyptic number.

It is an amenable number.

12201020221 is a deficient number, since it is larger than the sum of its proper divisors (1764407619).

12201020221 is a wasteful number, since it uses less digits than its factorization.

12201020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479716.

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

Adding to 12201020221 its reverse (12202010221), we get a palindrome (24403030442).

The spelling of 12201020221 in words is "twelve billion, two hundred one million, twenty thousand, two hundred twenty-one".