12981707381 has 2 divisors, whose sum is σ = 12981707382. Its totient is φ = 12981707380.

The previous prime is 12981707377. The next prime is 12981707429. The reversal of 12981707381 is 18370718921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11888413156 + 1093294225 = 109034^2 + 33065^2 .

It is a cyclic number.

It is not a de Polignac number, because 12981707381 - 2² = 12981707377 is a prime.

It is a super-2 number, since 2×12981707381² (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 (12981707351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6490853690 + 6490853691.

It is an arithmetic number, because the mean of its divisors is an integer number (6490853691).

Almost surely, 2^12981707381 is an apocalyptic number.

It is an amenable number.

12981707381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12981707381 is an equidigital number, since it uses as much as digits as its factorization.

12981707381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 47.

The spelling of 12981707381 in words is "twelve billion, nine hundred eighty-one million, seven hundred seven thousand, three hundred eighty-one".