12721256287 has 2 divisors, whose sum is σ = 12721256288. Its totient is φ = 12721256286.

The previous prime is 12721256239. The next prime is 12721256293. The reversal of 12721256287 is 78265212721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12721256287 - 2²³ = 12712867679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12721266287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6360628143 + 6360628144.

It is an arithmetic number, because the mean of its divisors is an integer number (6360628144).

Almost surely, 2^12721256287 is an apocalyptic number.

12721256287 is a deficient number, since it is larger than the sum of its proper divisors (1).

12721256287 is an equidigital number, since it uses as much as digits as its factorization.

12721256287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 43.

The spelling of 12721256287 in words is "twelve billion, seven hundred twenty-one million, two hundred fifty-six thousand, two hundred eighty-seven".