12448809121 has 6 divisors (see below), whose sum is σ = 14481267810. Its totient is φ = 10670407776.

The previous prime is 12448809071. The next prime is 12448809167. The reversal of 12448809121 is 12190884421.

It can be written as a sum of positive squares in only one way, i.e., 11095672896 + 1353136225 = 105336^2 + 36785^2 .

It is not a de Polignac number, because 12448809121 - 2²¹ = 12446711969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12448809421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127028616 + ... + 127028713.

It is an arithmetic number, because the mean of its divisors is an integer number (2413544635).

Almost surely, 2^12448809121 is an apocalyptic number.

It is an amenable number.

12448809121 is a deficient number, since it is larger than the sum of its proper divisors (2032458689).

12448809121 is an equidigital number, since it uses as much as digits as its factorization.

12448809121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254057343 (or 254057336 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The spelling of 12448809121 in words is "twelve billion, four hundred forty-eight million, eight hundred nine thousand, one hundred twenty-one".