12001319999 has 4 divisors (see below), whose sum is σ = 12632968440. Its totient is φ = 11369671560.

The previous prime is 12001319987. The next prime is 12001320047. The reversal of 12001319999 is 99991310021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001319999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001319929) 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, 315824192 + ... + 315824229.

It is an arithmetic number, because the mean of its divisors is an integer number (3158242110).

Almost surely, 2^12001319999 is an apocalyptic number.

12001319999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12001319999 is a deficient number, since it is larger than the sum of its proper divisors (631648441).

12001319999 is an equidigital number, since it uses as much as digits as its factorization.

12001319999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631648440.

The product of its (nonzero) digits is 39366, while the sum is 44.

The spelling of 12001319999 in words is "twelve billion, one million, three hundred nineteen thousand, nine hundred ninety-nine".