10010505521 has 2 divisors, whose sum is σ = 10010505522. Its totient is φ = 10010505520.

The previous prime is 10010505503. The next prime is 10010505551. The reversal of 10010505521 is 12550501001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9554085025 + 456420496 = 97745^2 + 21364^2 .

It is a cyclic number.

It is not a de Polignac number, because 10010505521 - 2¹⁸ = 10010243377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10010505493 and 10010505502.

It is not a weakly prime, because it can be changed into another prime (10010505551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005252760 + 5005252761.

It is an arithmetic number, because the mean of its divisors is an integer number (5005252761).

Almost surely, 2^10010505521 is an apocalyptic number.

It is an amenable number.

10010505521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10010505521 is an equidigital number, since it uses as much as digits as its factorization.

10010505521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250, while the sum is 20.

The spelling of 10010505521 in words is "ten billion, ten million, five hundred five thousand, five hundred twenty-one".