12712421677 has 2 divisors, whose sum is σ = 12712421678. Its totient is φ = 12712421676.

The previous prime is 12712421647. The next prime is 12712421693. The reversal of 12712421677 is 77612421721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7304437156 + 5407984521 = 85466^2 + 73539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12712421677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12712421647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6356210838 + 6356210839.

It is an arithmetic number, because the mean of its divisors is an integer number (6356210839).

Almost surely, 2^12712421677 is an apocalyptic number.

It is an amenable number.

12712421677 is a deficient number, since it is larger than the sum of its proper divisors (1).

12712421677 is an equidigital number, since it uses as much as digits as its factorization.

12712421677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65856, while the sum is 40.

The spelling of 12712421677 in words is "twelve billion, seven hundred twelve million, four hundred twenty-one thousand, six hundred seventy-seven".