12521660750551 has 8 divisors (see below), whose sum is σ = 12557993238000. Its totient is φ = 12485330856960.

The previous prime is 12521660750483. The next prime is 12521660750569. The reversal of 12521660750551 is 15505706612521.

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 12521660750551 - 2²³ = 12521652361943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521660750591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9238716 + ... + 10507006.

It is an arithmetic number, because the mean of its divisors is an integer number (1569749154750).

Almost surely, 2^{12521660750551} is an apocalyptic number.

12521660750551 is a deficient number, since it is larger than the sum of its proper divisors (36332487449).

12521660750551 is a wasteful number, since it uses less digits than its factorization.

12521660750551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296929.

The product of its (nonzero) digits is 630000, while the sum is 46.

The spelling of 12521660750551 in words is "twelve trillion, five hundred twenty-one billion, six hundred sixty million, seven hundred fifty thousand, five hundred fifty-one".