12501510521 has 8 divisors (see below), whose sum is σ = 12793022280. Its totient is φ = 12212059392.

The previous prime is 12501510493. The next prime is 12501510563.

12501510521 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 1849000000 + 10652510521 = 43000^2 + 103211^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12501510521 - 2²² = 12497316217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12501510221) 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 in 7 ways as a sum of consecutive naturals, for example, 502880 + ... + 527153.

It is an arithmetic number, because the mean of its divisors is an integer number (1599127785).

Almost surely, 2^12501510521 is an apocalyptic number.

It is an amenable number.

12501510521 is a deficient number, since it is larger than the sum of its proper divisors (291511759).

12501510521 is a wasteful number, since it uses less digits than its factorization.

12501510521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030315.

The product of its (nonzero) digits is 500, while the sum is 23.

The spelling of 12501510521 in words is "twelve billion, five hundred one million, five hundred ten thousand, five hundred twenty-one".