12340310721 has 4 divisors (see below), whose sum is σ = 16453747632. Its totient is φ = 8226873812.

The previous prime is 12340310713. The next prime is 12340310729. The reversal of 12340310721 is 12701304321.

It is a happy number.

12340310721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (12340310713) and next prime (12340310729).

It is a cyclic number.

It is not a de Polignac number, because 12340310721 - 2³ = 12340310713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12340310691 and 12340310700.

It is not an unprimeable number, because it can be changed into a prime (12340310729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2056718451 + ... + 2056718456.

It is an arithmetic number, because the mean of its divisors is an integer number (4113436908).

Almost surely, 2^12340310721 is an apocalyptic number.

It is an amenable number.

12340310721 is a deficient number, since it is larger than the sum of its proper divisors (4113436911).

12340310721 is an equidigital number, since it uses as much as digits as its factorization.

12340310721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113436910.

The product of its (nonzero) digits is 1008, while the sum is 24.

The spelling of 12340310721 in words is "twelve billion, three hundred forty million, three hundred ten thousand, seven hundred twenty-one".