12001001004 has 72 divisors (see below), whose sum is σ = 30651583872. Its totient is φ = 3958917120.

The previous prime is 12001000997. The next prime is 12001001011. The reversal of 12001001004 is 40010010021.

It is a happy number.

12001001004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12001000997) and next prime (12001001011).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1384524 + ... + 1393164.

Almost surely, 2^12001001004 is an apocalyptic number.

It is an amenable number.

12001001004 is an abundant number, since it is smaller than the sum of its proper divisors (18650582868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12001001004 is a wasteful number, since it uses less digits than its factorization.

12001001004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9047 (or 9042 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 12001001004 its reverse (40010010021), we get a palindrome (52011011025).

The spelling of 12001001004 in words is "twelve billion, one million, one thousand, four".