12221563723 has 2 divisors, whose sum is σ = 12221563724. Its totient is φ = 12221563722.

The previous prime is 12221563661. The next prime is 12221563747. The reversal of 12221563723 is 32736512221.

12221563723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221563723 is a prime.

It is not a weakly prime, because it can be changed into another prime (12221563223) 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 as a sum of consecutive naturals, namely, 6110781861 + 6110781862.

It is an arithmetic number, because the mean of its divisors is an integer number (6110781862).

Almost surely, 2^12221563723 is an apocalyptic number.

12221563723 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221563723 is an equidigital number, since it uses as much as digits as its factorization.

12221563723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

The spelling of 12221563723 in words is "twelve billion, two hundred twenty-one million, five hundred sixty-three thousand, seven hundred twenty-three".