2212121212 has 24 divisors (see below), whose sum is σ = 4426563456. Its totient is φ = 947554608.

The previous prime is 2212121203. The next prime is 2212121237. The reversal of 2212121212 is 2121212122.

It is a happy number.

2212121212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

2212121212 is a modest number, since divided by 121212 gives 2212 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36363 + ... + 75805.

It is an arithmetic number, because the mean of its divisors is an integer number (184440144).

Almost surely, 2^2212121212 is an apocalyptic number.

It is an amenable number.

2212121212 is an abundant number, since it is smaller than the sum of its proper divisors (2214442244).

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

2212121212 is a wasteful number, since it uses less digits than its factorization.

2212121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41457 (or 41455 counting only the distinct ones).

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

The square root of 2212121212 is about 47033.1926622040. The cubic root of 2212121212 is about 1302.9756711319.

Adding to 2212121212 its reverse (2121212122), we get a palindrome (4333333334).

It can be divided in two parts, 2 and 212121212, that multiplied together give a palindrome (424242424).

The spelling of 2212121212 in words is "two billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twelve".