12550205521 has 8 divisors (see below), whose sum is σ = 14344715520. Its totient is φ = 10756101408.

The previous prime is 12550205513. The next prime is 12550205537.

12550205521 is nontrivially palindromic in base 10.

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 12550205521 - 2³ = 12550205513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12550205521.

It is not an unprimeable number, because it can be changed into a prime (12550205501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32041 + ... + 161638.

It is an arithmetic number, because the mean of its divisors is an integer number (1793089440).

Almost surely, 2^12550205521 is an apocalyptic number.

It is an amenable number.

12550205521 is a deficient number, since it is larger than the sum of its proper divisors (1794509999).

12550205521 is an equidigital number, since it uses as much as digits as its factorization.

12550205521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202943.

The product of its (nonzero) digits is 5000, while the sum is 28.

The spelling of 12550205521 in words is "twelve billion, five hundred fifty million, two hundred five thousand, five hundred twenty-one".