12688981133 has 2 divisors, whose sum is σ = 12688981134. Its totient is φ = 12688981132.

The previous prime is 12688981121. The next prime is 12688981171. The reversal of 12688981133 is 33118988621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12579192649 + 109788484 = 112157^2 + 10478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12688981133 is a prime.

It is a super-2 number, since 2×12688981133² (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 (12688989133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6344490566 + 6344490567.

It is an arithmetic number, because the mean of its divisors is an integer number (6344490567).

Almost surely, 2^12688981133 is an apocalyptic number.

It is an amenable number.

12688981133 is a deficient number, since it is larger than the sum of its proper divisors (1).

12688981133 is an equidigital number, since it uses as much as digits as its factorization.

12688981133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 50.

The spelling of 12688981133 in words is "twelve billion, six hundred eighty-eight million, nine hundred eighty-one thousand, one hundred thirty-three".