10512442521 has 20 divisors (see below), whose sum is σ = 17947169152. Its totient is φ = 6007109688.

The previous prime is 10512442511. The next prime is 10512442561. The reversal of 10512442521 is 12524421501.

It is a happy number.

10512442521 is a `hidden beast` number, since 10 + 5 + 124 + 4 + 2 + 521 = 666.

It is not a de Polignac number, because 10512442521 - 2⁷ = 10512442393 is a prime.

It is a super-2 number, since 2×10512442521² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10512442511) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9269665 + ... + 9270798.

Almost surely, 2^10512442521 is an apocalyptic number.

It is an amenable number.

10512442521 is a deficient number, since it is larger than the sum of its proper divisors (7434726631).

10512442521 is an equidigital number, since it uses as much as digits as its factorization.

10512442521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18540482 (or 18540473 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The spelling of 10512442521 in words is "ten billion, five hundred twelve million, four hundred forty-two thousand, five hundred twenty-one".