12001201021999 has 4 divisors (see below), whose sum is σ = 13715658310864. Its totient is φ = 10286743733136.

The previous prime is 12001201021897. The next prime is 12001201022033. The reversal of 12001201021999 is 99912010210021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12001201021999 - 2³⁷ = 11863762068527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001201031999) 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, 857228644422 + ... + 857228644435.

It is an arithmetic number, because the mean of its divisors is an integer number (3428914577716).

Almost surely, 2^{12001201021999} is an apocalyptic number.

12001201021999 is a deficient number, since it is larger than the sum of its proper divisors (1714457288865).

12001201021999 is an equidigital number, since it uses as much as digits as its factorization.

12001201021999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714457288864.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 12001201021999 in words is "twelve trillion, one billion, two hundred one million, twenty-one thousand, nine hundred ninety-nine".