12001131111 has 16 divisors (see below), whose sum is σ = 16036161120. Its totient is φ = 7983450240.

The previous prime is 12001131083. The next prime is 12001131127. The reversal of 12001131111 is 11113110021.

It is not a de Polignac number, because 12001131111 - 2⁹ = 12001130599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001132111) 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 15 ways as a sum of consecutive naturals, for example, 3395101 + ... + 3398633.

It is an arithmetic number, because the mean of its divisors is an integer number (1002260070).

Almost surely, 2^12001131111 is an apocalyptic number.

12001131111 is a deficient number, since it is larger than the sum of its proper divisors (4035030009).

12001131111 is a wasteful number, since it uses less digits than its factorization.

12001131111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5666.

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 12001131111 its reverse (11113110021), we get a palindrome (23114241132).

It can be divided in two parts, 1200 and 1131111, that added together give a palindrome (1132311).

The spelling of 12001131111 in words is "twelve billion, one million, one hundred thirty-one thousand, one hundred eleven".