12347360721 has 12 divisors (see below), whose sum is σ = 17838259972. Its totient is φ = 8230104576.

The previous prime is 12347360717. The next prime is 12347360723. The reversal of 12347360721 is 12706374321.

12347360721 is a `hidden beast` number, since 1 + 2 + 3 + 47 + 3 + 607 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6648771600 + 5698589121 = 81540^2 + 75489^2 .

It is not a de Polignac number, because 12347360721 - 2² = 12347360717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12347360723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67936 + ... + 171201.

Almost surely, 2^12347360721 is an apocalyptic number.

It is an amenable number.

12347360721 is a deficient number, since it is larger than the sum of its proper divisors (5490899251).

12347360721 is a wasteful number, since it uses less digits than its factorization.

12347360721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244880 (or 244877 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The spelling of 12347360721 in words is "twelve billion, three hundred forty-seven million, three hundred sixty thousand, seven hundred twenty-one".