12943020641 has 2 divisors, whose sum is σ = 12943020642. Its totient is φ = 12943020640.

The previous prime is 12943020491. The next prime is 12943020659. The reversal of 12943020641 is 14602034921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10686390625 + 2256630016 = 103375^2 + 47504^2 .

It is an emirp because it is prime and its reverse (14602034921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12943020641 - 2¹⁸ = 12942758497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12943020598 and 12943020607.

It is not a weakly prime, because it can be changed into another prime (12943020241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6471510320 + 6471510321.

It is an arithmetic number, because the mean of its divisors is an integer number (6471510321).

Almost surely, 2^12943020641 is an apocalyptic number.

It is an amenable number.

12943020641 is a deficient number, since it is larger than the sum of its proper divisors (1).

12943020641 is an equidigital number, since it uses as much as digits as its factorization.

12943020641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 12943020641 in words is "twelve billion, nine hundred forty-three million, twenty thousand, six hundred forty-one".