12221244443 has 12 divisors (see below), whose sum is σ = 12328289064. Its totient is φ = 12115053600.

The previous prime is 12221244407. The next prime is 12221244457. The reversal of 12221244443 is 34444212221.

It is a happy number.

It is not a de Polignac number, because 12221244443 - 2⁶ = 12221244379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221244403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19006280 + ... + 19006922.

It is an arithmetic number, because the mean of its divisors is an integer number (1027357422).

Almost surely, 2^12221244443 is an apocalyptic number.

12221244443 is a deficient number, since it is larger than the sum of its proper divisors (107044621).

12221244443 is an frugal number, since it uses more digits than its factorization.

12221244443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546 (or 1355 counting only the distinct ones).

The product of its digits is 12288, while the sum is 29.

Adding to 12221244443 its reverse (34444212221), we get a palindrome (46665456664).

The spelling of 12221244443 in words is "twelve billion, two hundred twenty-one million, two hundred forty-four thousand, four hundred forty-three".