12221436356 has 12 divisors (see below), whose sum is σ = 21496081068. Its totient is φ = 6079698912.

The previous prime is 12221436349. The next prime is 12221436361. The reversal of 12221436356 is 65363412221.

It can be written as a sum of positive squares in 2 ways, for example, as 10518553600 + 1702882756 = 102560^2 + 41266^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7753931 + ... + 7755506.

It is an arithmetic number, because the mean of its divisors is an integer number (1791340089).

Almost surely, 2^12221436356 is an apocalyptic number.

It is an amenable number.

12221436356 is a deficient number, since it is larger than the sum of its proper divisors (9274644712).

12221436356 is a wasteful number, since it uses less digits than its factorization.

12221436356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15509638 (or 15509636 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

Adding to 12221436356 its reverse (65363412221), we get a palindrome (77584848577).

The spelling of 12221436356 in words is "twelve billion, two hundred twenty-one million, four hundred thirty-six thousand, three hundred fifty-six".