12771779113 has 2 divisors, whose sum is σ = 12771779114. Its totient is φ = 12771779112.

The previous prime is 12771779101. The next prime is 12771779213. The reversal of 12771779113 is 31197717721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10814336064 + 1957443049 = 103992^2 + 44243^2 .

It is a cyclic number.

It is not a de Polignac number, because 12771779113 - 2¹⁷ = 12771648041 is a prime.

It is a super-2 number, since 2×12771779113² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12771779213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6385889556 + 6385889557.

It is an arithmetic number, because the mean of its divisors is an integer number (6385889557).

Almost surely, 2^12771779113 is an apocalyptic number.

It is an amenable number.

12771779113 is a deficient number, since it is larger than the sum of its proper divisors (1).

12771779113 is an equidigital number, since it uses as much as digits as its factorization.

12771779113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129654, while the sum is 46.

The spelling of 12771779113 in words is "twelve billion, seven hundred seventy-one million, seven hundred seventy-nine thousand, one hundred thirteen".