12571883521 has 2 divisors, whose sum is σ = 12571883522. Its totient is φ = 12571883520.

The previous prime is 12571883491. The next prime is 12571883567. The reversal of 12571883521 is 12538817521.

12571883521 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 can be written as a sum of positive squares in only one way, i.e., 12429797121 + 142086400 = 111489^2 + 11920^2 .

It is a cyclic number.

It is not a de Polignac number, because 12571883521 - 2¹¹ = 12571881473 is a prime.

It is not a weakly prime, because it can be changed into another prime (12571883021) 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, 6285941760 + 6285941761.

It is an arithmetic number, because the mean of its divisors is an integer number (6285941761).

Almost surely, 2^12571883521 is an apocalyptic number.

It is an amenable number.

12571883521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12571883521 is an equidigital number, since it uses as much as digits as its factorization.

12571883521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 43.

The spelling of 12571883521 in words is "twelve billion, five hundred seventy-one million, eight hundred eighty-three thousand, five hundred twenty-one".