2012221212 has 12 divisors (see below), whose sum is σ = 4695182856. Its totient is φ = 670740400.

The previous prime is 2012221187. The next prime is 2012221219. The reversal of 2012221212 is 2121222102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 2012221191 and 2012221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012221219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83842539 + ... + 83842562.

It is an arithmetic number, because the mean of its divisors is an integer number (391265238).

Almost surely, 2^2012221212 is an apocalyptic number.

It is an amenable number.

2012221212 is an abundant number, since it is smaller than the sum of its proper divisors (2682961644).

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

2012221212 is a wasteful number, since it uses less digits than its factorization.

2012221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167685108 (or 167685106 counting only the distinct ones).

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

The square root of 2012221212 is about 44857.7887551315. The cubic root of 2012221212 is about 1262.4821340739.

Adding to 2012221212 its reverse (2121222102), we get a palindrome (4133443314).

The spelling of 2012221212 in words is "two billion, twelve million, two hundred twenty-one thousand, two hundred twelve".