12955681381 has 2 divisors, whose sum is σ = 12955681382. Its totient is φ = 12955681380.

The previous prime is 12955681379. The next prime is 12955681469. The reversal of 12955681381 is 18318655921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12308793025 + 646888356 = 110945^2 + 25434^2 .

It is an emirp because it is prime and its reverse (18318655921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12955681381 - 2¹ = 12955681379 is a prime.

It is a super-2 number, since 2×12955681381² (a number of 21 digits) contains 22 as substring.

Together with 12955681379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12955681681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6477840690 + 6477840691.

It is an arithmetic number, because the mean of its divisors is an integer number (6477840691).

Almost surely, 2^12955681381 is an apocalyptic number.

It is an amenable number.

12955681381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12955681381 is an equidigital number, since it uses as much as digits as its factorization.

12955681381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 49.

The spelling of 12955681381 in words is "twelve billion, nine hundred fifty-five million, six hundred eighty-one thousand, three hundred eighty-one".