13520335121 has 2 divisors, whose sum is σ = 13520335122. Its totient is φ = 13520335120.

The previous prime is 13520335069. The next prime is 13520335141. The reversal of 13520335121 is 12153302531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11976238096 + 1544097025 = 109436^2 + 39295^2 .

It is a cyclic number.

It is not a de Polignac number, because 13520335121 - 2¹⁰ = 13520334097 is a prime.

It is not a weakly prime, because it can be changed into another prime (13520335141) 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, 6760167560 + 6760167561.

It is an arithmetic number, because the mean of its divisors is an integer number (6760167561).

Almost surely, 2^13520335121 is an apocalyptic number.

It is an amenable number.

13520335121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13520335121 is an equidigital number, since it uses as much as digits as its factorization.

13520335121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 13520335121 its reverse (12153302531), we get a palindrome (25673637652).

The spelling of 13520335121 in words is "thirteen billion, five hundred twenty million, three hundred thirty-five thousand, one hundred twenty-one".