12312238651721 has 8 divisors (see below), whose sum is σ = 12357877538688. Its totient is φ = 12266601282000.

The previous prime is 12312238651679. The next prime is 12312238651733. The reversal of 12312238651721 is 12715683221321.

12312238651721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12312238651721 - 2¹⁴ = 12312238635337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12312238651771) 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, 17426066 + ... + 18118836.

It is an arithmetic number, because the mean of its divisors is an integer number (1544734692336).

Almost surely, 2^{12312238651721} is an apocalyptic number.

It is an amenable number.

12312238651721 is a deficient number, since it is larger than the sum of its proper divisors (45638886967).

12312238651721 is an equidigital number, since it uses as much as digits as its factorization.

12312238651721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758623.

The product of its digits is 241920, while the sum is 44.

The spelling of 12312238651721 in words is "twelve trillion, three hundred twelve billion, two hundred thirty-eight million, six hundred fifty-one thousand, seven hundred twenty-one".