12318865901 has 4 divisors (see below), whose sum is σ = 12716248704. Its totient is φ = 11921483100.

The previous prime is 12318865831. The next prime is 12318865919. The reversal of 12318865901 is 10956881321.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12318865901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12318865921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198691355 + ... + 198691416.

It is an arithmetic number, because the mean of its divisors is an integer number (3179062176).

Almost surely, 2^12318865901 is an apocalyptic number.

It is an amenable number.

12318865901 is a deficient number, since it is larger than the sum of its proper divisors (397382803).

12318865901 is an equidigital number, since it uses as much as digits as its factorization.

12318865901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397382802.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 12318865901 in words is "twelve billion, three hundred eighteen million, eight hundred sixty-five thousand, nine hundred one".