12219999977 has 2 divisors, whose sum is σ = 12219999978. Its totient is φ = 12219999976.

The previous prime is 12219999947. The next prime is 12220000057. The reversal of 12219999977 is 77999991221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11927042521 + 292957456 = 109211^2 + 17116^2 .

It is a cyclic number.

It is not a de Polignac number, because 12219999977 - 2¹² = 12219995881 is a prime.

It is not a weakly prime, because it can be changed into another prime (12219999947) 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, 6109999988 + 6109999989.

It is an arithmetic number, because the mean of its divisors is an integer number (6109999989).

Almost surely, 2^12219999977 is an apocalyptic number.

It is an amenable number.

12219999977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12219999977 is an equidigital number, since it uses as much as digits as its factorization.

12219999977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11573604, while the sum is 65.

The spelling of 12219999977 in words is "twelve billion, two hundred nineteen million, nine hundred ninety-nine thousand, nine hundred seventy-seven".