212121002212 has 24 divisors (see below), whose sum is σ = 424934113856. Its totient is φ = 90760691808.

The previous prime is 212121002173. The next prime is 212121002213. The reversal of 212121002212 is 212200121212.

It is a happy number.

It is a super-3 number, since 3×212121002212³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (212121002213) 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 7 ways as a sum of consecutive naturals, for example, 6162078 + ... + 6196405.

Almost surely, 2^212121002212 is an apocalyptic number.

It is an amenable number.

212121002212 is an abundant number, since it is smaller than the sum of its proper divisors (212813111644).

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

212121002212 is a wasteful number, since it uses less digits than its factorization.

212121002212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12359107 (or 12359105 counting only the distinct ones).

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

Adding to 212121002212 its reverse (212200121212), we get a palindrome (424321123424).

The spelling of 212121002212 in words is "two hundred twelve billion, one hundred twenty-one million, two thousand, two hundred twelve".