12001000001111 has 12 divisors (see below), whose sum is σ = 13192437967296. Its totient is φ = 10908961081920.

The previous prime is 12001000001087. The next prime is 12001000001113. The reversal of 12001000001111 is 11110000010021.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-12001000001111 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 (12001000001113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3445031 + ... + 5989176.

It is an arithmetic number, because the mean of its divisors is an integer number (1099369830608).

Almost surely, 2^{12001000001111} is an apocalyptic number.

12001000001111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12001000001111 is a deficient number, since it is larger than the sum of its proper divisors (1191437966185).

12001000001111 is a wasteful number, since it uses less digits than its factorization.

12001000001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9444742 (or 9444731 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 12001000001111 its reverse (11110000010021), we get a palindrome (23111000011132).

The spelling of 12001000001111 in words is "twelve trillion, one billion, one thousand, one hundred eleven".