12001000001 has 16 divisors (see below), whose sum is σ = 12922306560. Its totient is φ = 11111340240.

The previous prime is 12000999973. The next prime is 12001000003. The reversal of 12001000001 is 10000010021.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001000001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001000003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124556 + ... + 198786.

It is an arithmetic number, because the mean of its divisors is an integer number (807644160).

Almost surely, 2^12001000001 is an apocalyptic number.

It is an amenable number.

12001000001 is a deficient number, since it is larger than the sum of its proper divisors (921306559).

12001000001 is a wasteful number, since it uses less digits than its factorization.

12001000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74444.

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 12001000001 its reverse (10000010021), we get a palindrome (22001010022).

The spelling of 12001000001 in words is "twelve billion, one million, one", and thus it is an aban number and an uban number.