12223566779 has 2 divisors, whose sum is σ = 12223566780. Its totient is φ = 12223566778.

The previous prime is 12223566767. The next prime is 12223566781. The reversal of 12223566779 is 97766532221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12223566779 - 2¹⁶ = 12223501243 is a prime.

It is a Sophie Germain prime.

Together with 12223566781, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (12223566749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111783389 + 6111783390.

It is an arithmetic number, because the mean of its divisors is an integer number (6111783390).

Almost surely, 2^12223566779 is an apocalyptic number.

12223566779 is a deficient number, since it is larger than the sum of its proper divisors (1).

12223566779 is an equidigital number, since it uses as much as digits as its factorization.

12223566779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 50.

The spelling of 12223566779 in words is "twelve billion, two hundred twenty-three million, five hundred sixty-six thousand, seven hundred seventy-nine".