2121212212 has 48 divisors (see below), whose sum is σ = 4470256000. Its totient is φ = 860367744.

The previous prime is 2121212209. The next prime is 2121212263. The reversal of 2121212212 is 2122121212.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 886714 + ... + 889102.

Almost surely, 2^2121212212 is an apocalyptic number.

It is an amenable number.

2121212212 is an abundant number, since it is smaller than the sum of its proper divisors (2349043788).

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

2121212212 is a wasteful number, since it uses less digits than its factorization.

2121212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088 (or 4086 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 2121212212 is about 46056.6196327955. The cubic root of 2121212212 is about 1284.8764610451.

Adding to 2121212212 its reverse (2122121212), we get a palindrome (4243333424).

It can be divided in two parts, 2121212 and 212, that multiplied together give a palindrome (449696944).

The spelling of 2121212212 in words is "two billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twelve".