12331122012 has 144 divisors (see below), whose sum is σ = 34838294400. Its totient is φ = 3645982080.

The previous prime is 12331122007. The next prime is 12331122019. The reversal of 12331122012 is 21022113321.

12331122012 is a `hidden beast` number, since 123 + 311 + 220 + 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 not an unprimeable number, because it can be changed into a prime (12331122019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3245698 + ... + 3249494.

It is an arithmetic number, because the mean of its divisors is an integer number (241932600).

Almost surely, 2^12331122012 is an apocalyptic number.

12331122012 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 12331122012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17419147200).

12331122012 is an abundant number, since it is smaller than the sum of its proper divisors (22507172388).

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

12331122012 is a wasteful number, since it uses less digits than its factorization.

12331122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016 (or 4011 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12331122012 its reverse (21022113321), we get a palindrome (33353235333).

The spelling of 12331122012 in words is "twelve billion, three hundred thirty-one million, one hundred twenty-two thousand, twelve".