12221367237 has 20 divisors (see below), whose sum is σ = 18461751660. Its totient is φ = 8056027584.

The previous prime is 12221367233. The next prime is 12221367247. The reversal of 12221367237 is 73276312221.

12221367237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1305087876 + 10916279361 = 36126^2 + 104481^2 .

It is not a de Polignac number, because 12221367237 - 2² = 12221367233 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221367233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 840438 + ... + 854855.

It is an arithmetic number, because the mean of its divisors is an integer number (923087583).

Almost surely, 2^12221367237 is an apocalyptic number.

It is an amenable number.

12221367237 is a deficient number, since it is larger than the sum of its proper divisors (6240384423).

12221367237 is an equidigital number, since it uses as much as digits as its factorization.

12221367237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695394 (or 1695385 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

Adding to 12221367237 its reverse (73276312221), we get a palindrome (85497679458).

The spelling of 12221367237 in words is "twelve billion, two hundred twenty-one million, three hundred sixty-seven thousand, two hundred thirty-seven".