12839502521 has 2 divisors, whose sum is σ = 12839502522. Its totient is φ = 12839502520.

The previous prime is 12839502517. The next prime is 12839502527. The reversal of 12839502521 is 12520593821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10906669225 + 1932833296 = 104435^2 + 43964^2 .

It is a cyclic number.

It is not a de Polignac number, because 12839502521 - 2² = 12839502517 is a prime.

It is not a weakly prime, because it can be changed into another prime (12839502527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6419751260 + 6419751261.

It is an arithmetic number, because the mean of its divisors is an integer number (6419751261).

Almost surely, 2^12839502521 is an apocalyptic number.

It is an amenable number.

12839502521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12839502521 is an equidigital number, since it uses as much as digits as its factorization.

12839502521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 12839502521 in words is "twelve billion, eight hundred thirty-nine million, five hundred two thousand, five hundred twenty-one".