12001112122111 has 4 divisors (see below), whose sum is σ = 13715556710992. Its totient is φ = 10286667533232.

The previous prime is 12001112122067. The next prime is 12001112122141. The reversal of 12001112122111 is 11122121110021.

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 12001112122111 - 2⁹ = 12001112121599 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 (12001112122141) 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, 857222294430 + ... + 857222294443.

It is an arithmetic number, because the mean of its divisors is an integer number (3428889177748).

Almost surely, 2^{12001112122111} is an apocalyptic number.

12001112122111 is a deficient number, since it is larger than the sum of its proper divisors (1714444588881).

12001112122111 is an equidigital number, since it uses as much as digits as its factorization.

12001112122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714444588880.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 12001112122111 its reverse (11122121110021), we get a palindrome (23123233232132).

The spelling of 12001112122111 in words is "twelve trillion, one billion, one hundred twelve million, one hundred twenty-two thousand, one hundred eleven".