12221486729 has 2 divisors, whose sum is σ = 12221486730. Its totient is φ = 12221486728.

The previous prime is 12221486713. The next prime is 12221486731. The reversal of 12221486729 is 92768412221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8041605625 + 4179881104 = 89675^2 + 64652^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221486729 - 2⁴ = 12221486713 is a prime.

Together with 12221486731, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12221486729.

It is not a weakly prime, because it can be changed into another prime (12221486759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110743364 + 6110743365.

It is an arithmetic number, because the mean of its divisors is an integer number (6110743365).

Almost surely, 2^12221486729 is an apocalyptic number.

It is an amenable number.

12221486729 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221486729 is an equidigital number, since it uses as much as digits as its factorization.

12221486729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The spelling of 12221486729 in words is "twelve billion, two hundred twenty-one million, four hundred eighty-six thousand, seven hundred twenty-nine".