10515010505521 has 2 divisors, whose sum is σ = 10515010505522. Its totient is φ = 10515010505520.

The previous prime is 10515010505513. The next prime is 10515010505533. The reversal of 10515010505521 is 12550501051501.

It is a happy number.

10515010505521 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., 7470819558400 + 3044190947121 = 2733280^2 + 1744761^2 .

It is a cyclic number.

It is not a de Polignac number, because 10515010505521 - 2³ = 10515010505513 is a prime.

It is a super-2 number, since 2×10515010505521² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10515010305521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5257505252760 + 5257505252761.

It is an arithmetic number, because the mean of its divisors is an integer number (5257505252761).

Almost surely, 2^{10515010505521} is an apocalyptic number.

It is an amenable number.

10515010505521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10515010505521 is an equidigital number, since it uses as much as digits as its factorization.

10515010505521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6250, while the sum is 31.

The spelling of 10515010505521 in words is "ten trillion, five hundred fifteen billion, ten million, five hundred five thousand, five hundred twenty-one".