12345680321 has 16 divisors (see below), whose sum is σ = 13527433920. Its totient is φ = 11197275840.

The previous prime is 12345680267. The next prime is 12345680323. The reversal of 12345680321 is 12308654321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12345680321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12345680323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3068291 + ... + 3072311.

It is an arithmetic number, because the mean of its divisors is an integer number (845464620).

Almost surely, 2^12345680321 is an apocalyptic number.

It is an amenable number.

12345680321 is a deficient number, since it is larger than the sum of its proper divisors (1181753599).

12345680321 is a wasteful number, since it uses less digits than its factorization.

12345680321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8096.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 12345680321 in words is "twelve billion, three hundred forty-five million, six hundred eighty thousand, three hundred twenty-one".