12521257820027 has 12 divisors (see below), whose sum is σ = 13773696382488. Its totient is φ = 11374144346400.

The previous prime is 12521257820023. The next prime is 12521257820059. The reversal of 12521257820027 is 72002875212521.

It is not a de Polignac number, because 12521257820027 - 2² = 12521257820023 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 12521257820027.

It is not an unprimeable number, because it can be changed into a prime (12521257820023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39921818 + ... + 40234239.

It is an arithmetic number, because the mean of its divisors is an integer number (1147808031874).

Almost surely, 2^{12521257820027} is an apocalyptic number.

12521257820027 is a deficient number, since it is larger than the sum of its proper divisors (1252438562461).

12521257820027 is a wasteful number, since it uses less digits than its factorization.

12521257820027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80157370 (or 80157359 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 44.

The spelling of 12521257820027 in words is "twelve trillion, five hundred twenty-one billion, two hundred fifty-seven million, eight hundred twenty thousand, twenty-seven".