12311142012 has 144 divisors (see below), whose sum is σ = 35105528640. Its totient is φ = 3609391104.

The previous prime is 12311141993. The next prime is 12311142043. The reversal of 12311142012 is 21024111321.

12311142012 is a `hidden beast` number, since 1 + 231 + 1 + 1 + 420 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2979564 + ... + 2983692.

Almost surely, 2^12311142012 is an apocalyptic number.

12311142012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12311142012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17552764320).

12311142012 is an abundant number, since it is smaller than the sum of its proper divisors (22794386628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12311142012 is a wasteful number, since it uses less digits than its factorization.

12311142012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4452 (or 4447 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 12311142012 its reverse (21024111321), we get a palindrome (33335253333).

The spelling of 12311142012 in words is "twelve billion, three hundred eleven million, one hundred forty-two thousand, twelve".