12541713521721 has 8 divisors (see below), whose sum is σ = 16722384377664. Its totient is φ = 8361092506800.

The previous prime is 12541713521663. The next prime is 12541713521741. The reversal of 12541713521721 is 12712531714521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12541713521721 - 2¹⁷ = 12541713390649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12541713521741) 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, 11869101 + ... + 12882506.

It is an arithmetic number, because the mean of its divisors is an integer number (2090298047208).

Almost surely, 2^{12541713521721} is an apocalyptic number.

It is an amenable number.

12541713521721 is a deficient number, since it is larger than the sum of its proper divisors (4180670855943).

12541713521721 is a wasteful number, since it uses less digits than its factorization.

12541713521721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24920511.

The product of its digits is 117600, while the sum is 42.

The spelling of 12541713521721 in words is "twelve trillion, five hundred forty-one billion, seven hundred thirteen million, five hundred twenty-one thousand, seven hundred twenty-one".