12321037987 has 2 divisors, whose sum is σ = 12321037988. Its totient is φ = 12321037986.

The previous prime is 12321037957. The next prime is 12321038011. The reversal of 12321037987 is 78973012321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12321037987 - 2¹⁵ = 12321005219 is a prime.

It is not a weakly prime, because it can be changed into another prime (12321037907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160518993 + 6160518994.

It is an arithmetic number, because the mean of its divisors is an integer number (6160518994).

Almost surely, 2^12321037987 is an apocalyptic number.

12321037987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321037987 is an equidigital number, since it uses as much as digits as its factorization.

12321037987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 12321037987 in words is "twelve billion, three hundred twenty-one million, thirty-seven thousand, nine hundred eighty-seven".