12000001111 has 4 divisors (see below), whose sum is σ = 13714286992. Its totient is φ = 10285715232.

The previous prime is 12000001051. The next prime is 12000001129. The reversal of 12000001111 is 11110000021.

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 12000001111 - 2⁷ = 12000000983 is a prime.

It is a super-3 number, since 3×12000001111³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (7), and also a Moran number because the ratio is a prime number: 1714285873 = 12000001111 / (1 + 2 + 0 + 0 + 0 + 0 + 0 + 1 + 1 + 1 + 1).

12000001111 is a modest number, since divided by 1111 gives 120 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 12000001094 and 12000001103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000001151) 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, 857142930 + ... + 857142943.

It is an arithmetic number, because the mean of its divisors is an integer number (3428571748).

Almost surely, 2^12000001111 is an apocalyptic number.

12000001111 is a deficient number, since it is larger than the sum of its proper divisors (1714285881).

12000001111 is an equidigital number, since it uses as much as digits as its factorization.

12000001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714285880.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 12000001111 its reverse (11110000021), we get a palindrome (23110001132).

The spelling of 12000001111 in words is "twelve billion, one thousand, one hundred eleven".