12448856521 has 2 divisors, whose sum is σ = 12448856522. Its totient is φ = 12448856520.

The previous prime is 12448856503. The next prime is 12448856531. The reversal of 12448856521 is 12565884421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11878602121 + 570254400 = 108989^2 + 23880^2 .

It is a cyclic number.

It is not a de Polignac number, because 12448856521 - 2¹³ = 12448848329 is a prime.

It is not a weakly prime, because it can be changed into another prime (12448856531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6224428260 + 6224428261.

It is an arithmetic number, because the mean of its divisors is an integer number (6224428261).

Almost surely, 2^12448856521 is an apocalyptic number.

It is an amenable number.

12448856521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12448856521 is an equidigital number, since it uses as much as digits as its factorization.

12448856521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 614400, while the sum is 46.

The spelling of 12448856521 in words is "twelve billion, four hundred forty-eight million, eight hundred fifty-six thousand, five hundred twenty-one".