12010011111 has 24 divisors (see below), whose sum is σ = 19908341024. Its totient is φ = 6834378240.

The previous prime is 12010011073. The next prime is 12010011119. The reversal of 12010011111 is 11111001021.

It is not a de Polignac number, because 12010011111 - 2³¹ = 9862527463 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12010011093 and 12010011102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12010011119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 380326 + ... + 410691.

Almost surely, 2^12010011111 is an apocalyptic number.

12010011111 is a deficient number, since it is larger than the sum of its proper divisors (7898329913).

12010011111 is a wasteful number, since it uses less digits than its factorization.

12010011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791271 (or 791268 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 12010011111 its reverse (11111001021), we get a palindrome (23121012132).

The spelling of 12010011111 in words is "twelve billion, ten million, eleven thousand, one hundred eleven".