12001111012111 has 8 divisors (see below), whose sum is σ = 12925318125440. Its totient is φ = 11077053145632.

The previous prime is 12001111012057. The next prime is 12001111012139. The reversal of 12001111012111 is 11121011110021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12001111012111 - 2¹⁵ = 12001110979343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001111012091 and 12001111012100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001111012181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37144671 + ... + 37466368.

It is an arithmetic number, because the mean of its divisors is an integer number (1615664765680).

Almost surely, 2^{12001111012111} is an apocalyptic number.

12001111012111 is a deficient number, since it is larger than the sum of its proper divisors (924207113329).

12001111012111 is a wasteful number, since it uses less digits than its factorization.

12001111012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74623425.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 12001111012111 its reverse (11121011110021), we get a palindrome (23122122122132).

The spelling of 12001111012111 in words is "twelve trillion, one billion, one hundred eleven million, twelve thousand, one hundred eleven".