12199618777 has 2 divisors, whose sum is σ = 12199618778. Its totient is φ = 12199618776.

The previous prime is 12199618771. The next prime is 12199618793. The reversal of 12199618777 is 77781699121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7098231001 + 5101387776 = 84251^2 + 71424^2 .

It is a cyclic number.

It is not a de Polignac number, because 12199618777 - 2¹⁹ = 12199094489 is a prime.

It is a super-3 number, since 3×12199618777³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (12199618771) 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, 6099809388 + 6099809389.

It is an arithmetic number, because the mean of its divisors is an integer number (6099809389).

Almost surely, 2^12199618777 is an apocalyptic number.

It is an amenable number.

12199618777 is a deficient number, since it is larger than the sum of its proper divisors (1).

12199618777 is an equidigital number, since it uses as much as digits as its factorization.

12199618777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2667168, while the sum is 58.

The spelling of 12199618777 in words is "twelve billion, one hundred ninety-nine million, six hundred eighteen thousand, seven hundred seventy-seven".