12013231142 has 24 divisors (see below), whose sum is σ = 19860189888. Its totient is φ = 5445879120.

The previous prime is 12013231141. The next prime is 12013231159. The reversal of 12013231142 is 24113231021.

It is a super-2 number, since 2×12013231142² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013231141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23723 + ... + 156809.

It is an arithmetic number, because the mean of its divisors is an integer number (827507912).

Almost surely, 2^12013231142 is an apocalyptic number.

12013231142 is a deficient number, since it is larger than the sum of its proper divisors (7846958746).

12013231142 is a wasteful number, since it uses less digits than its factorization.

12013231142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133484 (or 133473 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12013231142 its reverse (24113231021), we get a palindrome (36126462163).

The spelling of 12013231142 in words is "twelve billion, thirteen million, two hundred thirty-one thousand, one hundred forty-two".