12011113131 has 16 divisors (see below), whose sum is σ = 16869158400. Its totient is φ = 7580811168.

The previous prime is 12011113117. The next prime is 12011113201. The reversal of 12011113131 is 13131111021.

It is not a de Polignac number, because 12011113131 - 2⁶ = 12011113067 is a prime.

It is a super-2 number, since 2×12011113131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12011113131.

It is not an unprimeable number, because it can be changed into a prime (12011113031) 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, 13905 + ... + 155613.

It is an arithmetic number, because the mean of its divisors is an integer number (1054322400).

Almost surely, 2^12011113131 is an apocalyptic number.

12011113131 is a deficient number, since it is larger than the sum of its proper divisors (4858045269).

12011113131 is a wasteful number, since it uses less digits than its factorization.

12011113131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143218.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 12011113131 its reverse (13131111021), we get a palindrome (25142224152).

The spelling of 12011113131 in words is "twelve billion, eleven million, one hundred thirteen thousand, one hundred thirty-one".