12220243221 has 16 divisors (see below), whose sum is σ = 16394738688. Its totient is φ = 8096371200.

The previous prime is 12220243181. The next prime is 12220243237. The reversal of 12220243221 is 12234202221.

It is not a de Polignac number, because 12220243221 - 2²¹ = 12218146069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220243261) 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, 618861 + ... + 638301.

It is an arithmetic number, because the mean of its divisors is an integer number (1024671168).

Almost surely, 2^12220243221 is an apocalyptic number.

It is an amenable number.

12220243221 is a deficient number, since it is larger than the sum of its proper divisors (4174495467).

12220243221 is a wasteful number, since it uses less digits than its factorization.

12220243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20732.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 12220243221 its reverse (12234202221), we get a palindrome (24454445442).

The spelling of 12220243221 in words is "twelve billion, two hundred twenty million, two hundred forty-three thousand, two hundred twenty-one".