12550255205521 has 32 divisors (see below), whose sum is σ = 14532268924800. Its totient is φ = 10807800537600.

The previous prime is 12550255205473. The next prime is 12550255205531.

12550255205521 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12550255205521 - 2²¹ = 12550253108369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12550255205531) 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 31 ways as a sum of consecutive naturals, for example, 395529385 + ... + 395561113.

It is an arithmetic number, because the mean of its divisors is an integer number (454133403900).

Almost surely, 2^{12550255205521} is an apocalyptic number.

12550255205521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12550255205521 is a deficient number, since it is larger than the sum of its proper divisors (1982013719279).

12550255205521 is a wasteful number, since it uses less digits than its factorization.

12550255205521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47422 (or 47400 counting only the distinct ones).

The product of its (nonzero) digits is 250000, while the sum is 40.

The spelling of 12550255205521 in words is "twelve trillion, five hundred fifty billion, two hundred fifty-five million, two hundred five thousand, five hundred twenty-one".