12011343111 has 12 divisors (see below), whose sum is σ = 17909386560. Its totient is φ = 7749253440.

The previous prime is 12011343103. The next prime is 12011343119. The reversal of 12011343111 is 11134311021.

It is a happy number.

12011343111 is a `hidden beast` number, since 120 + 113 + 431 + 1 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (12011343103) and next prime (12011343119).

It is not a de Polignac number, because 12011343111 - 2³ = 12011343103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011343119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21525426 + ... + 21525983.

It is an arithmetic number, because the mean of its divisors is an integer number (1492448880).

Almost surely, 2^12011343111 is an apocalyptic number.

12011343111 is a deficient number, since it is larger than the sum of its proper divisors (5898043449).

12011343111 is a wasteful number, since it uses less digits than its factorization.

12011343111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43051446 (or 43051443 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 12011343111 its reverse (11134311021), we get a palindrome (23145654132).

The spelling of 12011343111 in words is "twelve billion, eleven million, three hundred forty-three thousand, one hundred eleven".