12122021021987 has 2 divisors, whose sum is σ = 12122021021988. Its totient is φ = 12122021021986.

The previous prime is 12122021021953. The next prime is 12122021022011. The reversal of 12122021021987 is 78912012022121.

It is a strong prime.

It is an emirp because it is prime and its reverse (78912012022121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12122021021987 - 2²⁰ = 12122019973411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12122021021987.

It is not a weakly prime, because it can be changed into another prime (12122021021927) 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 as a sum of consecutive naturals, namely, 6061010510993 + 6061010510994.

It is an arithmetic number, because the mean of its divisors is an integer number (6061010510994).

Almost surely, 2^{12122021021987} is an apocalyptic number.

12122021021987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122021021987 is an equidigital number, since it uses as much as digits as its factorization.

12122021021987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 12122021021987 in words is "twelve trillion, one hundred twenty-two billion, twenty-one million, twenty-one thousand, nine hundred eighty-seven".