12712421647 has 2 divisors, whose sum is σ = 12712421648. Its totient is φ = 12712421646.

The previous prime is 12712421593. The next prime is 12712421677. The reversal of 12712421647 is 74612421721.

It is a strong prime.

It is an emirp because it is prime and its reverse (74612421721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12712421647 - 2¹⁵ = 12712388879 is a prime.

It is a super-2 number, since 2×12712421647² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12712421677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6356210823 + 6356210824.

It is an arithmetic number, because the mean of its divisors is an integer number (6356210824).

Almost surely, 2^12712421647 is an apocalyptic number.

12712421647 is a deficient number, since it is larger than the sum of its proper divisors (1).

12712421647 is an equidigital number, since it uses as much as digits as its factorization.

12712421647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 37.

The spelling of 12712421647 in words is "twelve billion, seven hundred twelve million, four hundred twenty-one thousand, six hundred forty-seven".