12011131143 has 32 divisors (see below), whose sum is σ = 20433619200. Its totient is φ = 6896340000.

The previous prime is 12011131141. The next prime is 12011131151. The reversal of 12011131143 is 34113111021.

It is a happy number.

It is not a de Polignac number, because 12011131143 - 2¹ = 12011131141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011131141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1058608 + ... + 1069893.

It is an arithmetic number, because the mean of its divisors is an integer number (638550600).

Almost surely, 2^12011131143 is an apocalyptic number.

12011131143 is a deficient number, since it is larger than the sum of its proper divisors (8422488057).

12011131143 is a wasteful number, since it uses less digits than its factorization.

12011131143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128540 (or 2128534 counting only the distinct ones).

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

Adding to 12011131143 its reverse (34113111021), we get a palindrome (46124242164).

The spelling of 12011131143 in words is "twelve billion, eleven million, one hundred thirty-one thousand, one hundred forty-three".