12001319987 has 2 divisors, whose sum is σ = 12001319988. Its totient is φ = 12001319986.

The previous prime is 12001319959. The next prime is 12001320047. The reversal of 12001319987 is 78991310021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12001319987 - 2¹⁴ = 12001303603 is a prime.

It is not a weakly prime, because it can be changed into another prime (12001319917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000659993 + 6000659994.

It is an arithmetic number, because the mean of its divisors is an integer number (6000659994).

Almost surely, 2^12001319987 is an apocalyptic number.

12001319987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001319987 is an equidigital number, since it uses as much as digits as its factorization.

12001319987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The spelling of 12001319987 in words is "twelve billion, one million, three hundred nineteen thousand, nine hundred eighty-seven".