12001221002987 has 4 divisors (see below), whose sum is σ = 12001231435440. Its totient is φ = 12001210570536.

The previous prime is 12001221002963. The next prime is 12001221002993. The reversal of 12001221002987 is 78920012210021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12001221002987 - 2⁶ = 12001221002923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001221002587) 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, 3241463 + ... + 5874480.

It is an arithmetic number, because the mean of its divisors is an integer number (3000307858860).

Almost surely, 2^{12001221002987} is an apocalyptic number.

12001221002987 is a deficient number, since it is larger than the sum of its proper divisors (10432453).

12001221002987 is an equidigital number, since it uses as much as digits as its factorization.

12001221002987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10432452.

The product of its (nonzero) digits is 8064, while the sum is 35.

The spelling of 12001221002987 in words is "twelve trillion, one billion, two hundred twenty-one million, two thousand, nine hundred eighty-seven".