12012222012 has 72 divisors (see below), whose sum is σ = 32675763456. Its totient is φ = 3424573152.

The previous prime is 12012222011. The next prime is 12012222017. The reversal of 12012222012 is 21022221021.

It is a junction number, because it is equal to n+sod(n) for n = 12012221982 and 12012222000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012222011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250183 + ... + 294305.

It is an arithmetic number, because the mean of its divisors is an integer number (453830048).

Almost surely, 2^12012222012 is an apocalyptic number.

12012222012 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 12012222012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16337881728).

12012222012 is an abundant number, since it is smaller than the sum of its proper divisors (20663541444).

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

12012222012 is a wasteful number, since it uses less digits than its factorization.

12012222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44607 (or 44598 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12012222012 its reverse (21022221021), we get a palindrome (33034443033).

Subtracting 12012222012 from its reverse (21022221021), we obtain a palindrome (9009999009).

The spelling of 12012222012 in words is "twelve billion, twelve million, two hundred twenty-two thousand, twelve".