12534122143521 has 48 divisors (see below), whose sum is σ = 21166478386560. Its totient is φ = 7069775074560.

The previous prime is 12534122143511. The next prime is 12534122143597.

12534122143521 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 4 + 122 + 1 + 4 + 3 + 521 = 666.

12534122143521 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12534122143521 - 2²¹ = 12534120046369 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12534122143511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74303116 + ... + 74471613.

It is an arithmetic number, because the mean of its divisors is an integer number (440968299720).

Almost surely, 2^{12534122143521} is an apocalyptic number.

12534122143521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12534122143521 is a deficient number, since it is larger than the sum of its proper divisors (8632356243039).

12534122143521 is a wasteful number, since it uses less digits than its factorization.

12534122143521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148774806 (or 148774803 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

It can be divided in two parts, 1253412 and 2143521, that added together give a palindrome (3396933).

The spelling of 12534122143521 in words is "twelve trillion, five hundred thirty-four billion, one hundred twenty-two million, one hundred forty-three thousand, five hundred twenty-one".