12219677881 has 2 divisors, whose sum is σ = 12219677882. Its totient is φ = 12219677880.

The previous prime is 12219677819. The next prime is 12219677923. The reversal of 12219677881 is 18877691221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8164026025 + 4055651856 = 90355^2 + 63684^2 .

It is an emirp because it is prime and its reverse (18877691221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12219677881 - 2²³ = 12211289273 is a prime.

It is a super-2 number, since 2×12219677881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12219677381) 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, 6109838940 + 6109838941.

It is an arithmetic number, because the mean of its divisors is an integer number (6109838941).

Almost surely, 2^12219677881 is an apocalyptic number.

It is an amenable number.

12219677881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12219677881 is an equidigital number, since it uses as much as digits as its factorization.

12219677881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 52.

The spelling of 12219677881 in words is "twelve billion, two hundred nineteen million, six hundred seventy-seven thousand, eight hundred eighty-one".