12305349521 has 2 divisors, whose sum is σ = 12305349522. Its totient is φ = 12305349520.

The previous prime is 12305349437. The next prime is 12305349527. The reversal of 12305349521 is 12594350321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12218207296 + 87142225 = 110536^2 + 9335^2 .

It is a cyclic number.

It is not a de Polignac number, because 12305349521 - 2¹⁴ = 12305333137 is a prime.

It is not a weakly prime, because it can be changed into another prime (12305349527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6152674760 + 6152674761.

It is an arithmetic number, because the mean of its divisors is an integer number (6152674761).

Almost surely, 2^12305349521 is an apocalyptic number.

It is an amenable number.

12305349521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12305349521 is an equidigital number, since it uses as much as digits as its factorization.

12305349521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

Adding to 12305349521 its reverse (12594350321), we get a palindrome (24899699842).

The spelling of 12305349521 in words is "twelve billion, three hundred five million, three hundred forty-nine thousand, five hundred twenty-one".