12001120111 has 4 divisors (see below), whose sum is σ = 12067424824. Its totient is φ = 11934815400.

The previous prime is 12001120099. The next prime is 12001120121. The reversal of 12001120111 is 11102110021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001120111 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 (12001120121) 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, 33152085 + ... + 33152446.

It is an arithmetic number, because the mean of its divisors is an integer number (3016856206).

Almost surely, 2^12001120111 is an apocalyptic number.

12001120111 is a deficient number, since it is larger than the sum of its proper divisors (66304713).

12001120111 is an equidigital number, since it uses as much as digits as its factorization.

12001120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66304712.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12001120111 its reverse (11102110021), we get a palindrome (23103230132).

The spelling of 12001120111 in words is "twelve billion, one million, one hundred twenty thousand, one hundred eleven".