12001101999 has 4 divisors (see below), whose sum is σ = 16001469336. Its totient is φ = 8000734664.

The previous prime is 12001101971. The next prime is 12001102007. The reversal of 12001101999 is 99910110021.

12001101999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12001101999 - 2²⁰ = 12000053423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001101919) 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 in 3 ways as a sum of consecutive naturals, for example, 2000183664 + ... + 2000183669.

It is an arithmetic number, because the mean of its divisors is an integer number (4000367334).

Almost surely, 2^12001101999 is an apocalyptic number.

12001101999 is a deficient number, since it is larger than the sum of its proper divisors (4000367337).

12001101999 is an equidigital number, since it uses as much as digits as its factorization.

12001101999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000367336.

The product of its (nonzero) digits is 1458, while the sum is 33.

The spelling of 12001101999 in words is "twelve billion, one million, one hundred one thousand, nine hundred ninety-nine".