12449257321 has 2 divisors, whose sum is σ = 12449257322. Its totient is φ = 12449257320.

The previous prime is 12449257313. The next prime is 12449257333. The reversal of 12449257321 is 12375294421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7385511721 + 5063745600 = 85939^2 + 71160^2 .

It is a cyclic number.

It is not a de Polignac number, because 12449257321 - 2³ = 12449257313 is a prime.

It is not a weakly prime, because it can be changed into another prime (12449257391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6224628660 + 6224628661.

It is an arithmetic number, because the mean of its divisors is an integer number (6224628661).

Almost surely, 2^12449257321 is an apocalyptic number.

It is an amenable number.

12449257321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12449257321 is an equidigital number, since it uses as much as digits as its factorization.

12449257321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The spelling of 12449257321 in words is "twelve billion, four hundred forty-nine million, two hundred fifty-seven thousand, three hundred twenty-one".