12001211209987 has 2 divisors, whose sum is σ = 12001211209988. Its totient is φ = 12001211209986.

The previous prime is 12001211209943. The next prime is 12001211210041. The reversal of 12001211209987 is 78990211210021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12001211209987 - 2³¹ = 11999063726339 is a prime.

It is not a weakly prime, because it can be changed into another prime (12001211209907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000605604993 + 6000605604994.

It is an arithmetic number, because the mean of its divisors is an integer number (6000605604994).

Almost surely, 2^{12001211209987} is an apocalyptic number.

12001211209987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001211209987 is an equidigital number, since it uses as much as digits as its factorization.

12001211209987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 43.

The spelling of 12001211209987 in words is "twelve trillion, one billion, two hundred eleven million, two hundred nine thousand, nine hundred eighty-seven".