12012121212 has 48 divisors (see below), whose sum is σ = 34496351232. Its totient is φ = 3168031680.

The previous prime is 12012121207. The next prime is 12012121213. The reversal of 12012121212 is 21212121021.

12012121212 is a modest number, since divided by 121212 gives 12012 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 12012121191 and 12012121200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012121213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5498964 + ... + 5501147.

It is an arithmetic number, because the mean of its divisors is an integer number (718673984).

Almost surely, 2^12012121212 is an apocalyptic number.

12012121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12012121212 is an abundant number, since it is smaller than the sum of its proper divisors (22484230020).

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

12012121212 is a wasteful number, since it uses less digits than its factorization.

12012121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11000138 (or 11000136 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12012121212 its reverse (21212121021), we get a palindrome (33224242233).

The spelling of 12012121212 in words is "twelve billion, twelve million, one hundred twenty-one thousand, two hundred twelve".