12011001011111 has 16 divisors (see below), whose sum is σ = 12694874817600. Its totient is φ = 11346326304768.

The previous prime is 12011001011083. The next prime is 12011001011117. The reversal of 12011001011111 is 11111010011021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12011001011111 - 2²² = 12010996816807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011001011092 and 12011001011101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011001011117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10332026 + ... + 11435591.

It is an arithmetic number, because the mean of its divisors is an integer number (793429676100).

Almost surely, 2^{12011001011111} is an apocalyptic number.

12011001011111 is a deficient number, since it is larger than the sum of its proper divisors (683873806489).

12011001011111 is a wasteful number, since it uses less digits than its factorization.

12011001011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21768058.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 12011001011111 its reverse (11111010011021), we get a palindrome (23122011022132).

The spelling of 12011001011111 in words is "twelve trillion, eleven billion, one million, eleven thousand, one hundred eleven".