12821105939 has 2 divisors, whose sum is σ = 12821105940. Its totient is φ = 12821105938.

The previous prime is 12821105923. The next prime is 12821105981. The reversal of 12821105939 is 93950112821.

12821105939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12821105939 - 2⁴ = 12821105923 is a prime.

It is a super-2 number, since 2×12821105939² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 12821105896 and 12821105905.

It is not a weakly prime, because it can be changed into another prime (12821105839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6410552969 + 6410552970.

It is an arithmetic number, because the mean of its divisors is an integer number (6410552970).

Almost surely, 2^12821105939 is an apocalyptic number.

12821105939 is a deficient number, since it is larger than the sum of its proper divisors (1).

12821105939 is an equidigital number, since it uses as much as digits as its factorization.

12821105939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 41.

The spelling of 12821105939 in words is "twelve billion, eight hundred twenty-one million, one hundred five thousand, nine hundred thirty-nine".