12721157212751 has 8 divisors (see below), whose sum is σ = 13699810625424. Its totient is φ = 11742518494080.

The previous prime is 12721157212721. The next prime is 12721157212763. The reversal of 12721157212751 is 15721275112721.

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 12721157212751 - 2²² = 12721153018447 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 (12721157212721) 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, 1841585 + ... + 5369706.

It is an arithmetic number, because the mean of its divisors is an integer number (1712476328178).

Almost surely, 2^{12721157212751} is an apocalyptic number.

12721157212751 is a deficient number, since it is larger than the sum of its proper divisors (978653412673).

12721157212751 is a wasteful number, since it uses less digits than its factorization.

12721157212751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7347001.

The product of its digits is 137200, while the sum is 44.

The spelling of 12721157212751 in words is "twelve trillion, seven hundred twenty-one billion, one hundred fifty-seven million, two hundred twelve thousand, seven hundred fifty-one".