12031020012 has 48 divisors (see below), whose sum is σ = 30807850752. Its totient is φ = 3623926080.

The previous prime is 12031019993. The next prime is 12031020017. The reversal of 12031020012 is 21002013021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 12031020012.

It is not an unprimeable number, because it can be changed into a prime (12031020017) 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, 250843 + ... + 294930.

It is an arithmetic number, because the mean of its divisors is an integer number (641830224).

Almost surely, 2^12031020012 is an apocalyptic number.

12031020012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12031020012 is an abundant number, since it is smaller than the sum of its proper divisors (18776830740).

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

12031020012 is a wasteful number, since it uses less digits than its factorization.

12031020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545958 (or 545956 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 12031020012 its reverse (21002013021), we get a palindrome (33033033033).

The spelling of 12031020012 in words is "twelve billion, thirty-one million, twenty thousand, twelve".