13240054211521 has 2 divisors, whose sum is σ = 13240054211522. Its totient is φ = 13240054211520.

The previous prime is 13240054211497. The next prime is 13240054211581. The reversal of 13240054211521 is 12511245004231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12851257068225 + 388797143296 = 3584865^2 + 623536^2 .

It is a cyclic number.

It is not a de Polignac number, because 13240054211521 - 2⁷ = 13240054211393 is a prime.

It is not a weakly prime, because it can be changed into another prime (13240054211581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6620027105760 + 6620027105761.

It is an arithmetic number, because the mean of its divisors is an integer number (6620027105761).

Almost surely, 2^{13240054211521} is an apocalyptic number.

It is an amenable number.

13240054211521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13240054211521 is an equidigital number, since it uses as much as digits as its factorization.

13240054211521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 13240054211521 its reverse (12511245004231), we get a palindrome (25751299215752).

The spelling of 13240054211521 in words is "thirteen trillion, two hundred forty billion, fifty-four million, two hundred eleven thousand, five hundred twenty-one".