12031111142 has 16 divisors (see below), whose sum is σ = 18848563920. Its totient is φ = 5753767968.

The previous prime is 12031111091. The next prime is 12031111151. The reversal of 12031111142 is 24111113021.

It is a super-2 number, since 2×12031111142² (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 12031111142.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1373453 + ... + 1382184.

It is an arithmetic number, because the mean of its divisors is an integer number (1178035245).

Almost surely, 2^12031111142 is an apocalyptic number.

12031111142 is a deficient number, since it is larger than the sum of its proper divisors (6817452778).

12031111142 is a wasteful number, since it uses less digits than its factorization.

12031111142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755735.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12031111142 its reverse (24111113021), we get a palindrome (36142224163).

The spelling of 12031111142 in words is "twelve billion, thirty-one million, one hundred eleven thousand, one hundred forty-two".