10516206521 has 2 divisors, whose sum is σ = 10516206522. Its totient is φ = 10516206520.

The previous prime is 10516206517. The next prime is 10516206653. The reversal of 10516206521 is 12560261501.

It is a happy number.

10516206521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10514246521 + 1960000 = 102539^2 + 1400^2 .

It is an emirp because it is prime and its reverse (12560261501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10516206521 - 2² = 10516206517 is a prime.

It is a super-2 number, since 2×10516206521² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10510206521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5258103260 + 5258103261.

It is an arithmetic number, because the mean of its divisors is an integer number (5258103261).

Almost surely, 2^10516206521 is an apocalyptic number.

It is an amenable number.

10516206521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10516206521 is an equidigital number, since it uses as much as digits as its factorization.

10516206521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 10516206521 in words is "ten billion, five hundred sixteen million, two hundred six thousand, five hundred twenty-one".