12221244577 has 2 divisors, whose sum is σ = 12221244578. Its totient is φ = 12221244576.

The previous prime is 12221244523. The next prime is 12221244589. The reversal of 12221244577 is 77544212221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11773118016 + 448126561 = 108504^2 + 21169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221244577 is a prime.

It is not a weakly prime, because it can be changed into another prime (12221244877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110622288 + 6110622289.

It is an arithmetic number, because the mean of its divisors is an integer number (6110622289).

Almost surely, 2^12221244577 is an apocalyptic number.

It is an amenable number.

12221244577 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221244577 is an equidigital number, since it uses as much as digits as its factorization.

12221244577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62720, while the sum is 37.

Adding to 12221244577 its reverse (77544212221), we get a palindrome (89765456798).

The spelling of 12221244577 in words is "twelve billion, two hundred twenty-one million, two hundred forty-four thousand, five hundred seventy-seven".