212021210212 has 24 divisors (see below), whose sum is σ = 424155199104. Its totient is φ = 90842066112.

The previous prime is 212021210207. The next prime is 212021210237. The reversal of 212021210212 is 212012120212.

It is a happy number.

It is a super-2 number, since 2×212021210212² (a number of 23 digits) contains 22 as substring.

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, 899593 + ... + 1110544.

It is an arithmetic number, because the mean of its divisors is an integer number (17673133296).

Almost surely, 2^212021210212 is an apocalyptic number.

It is an amenable number.

212021210212 is an abundant number, since it is smaller than the sum of its proper divisors (212133988892).

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

212021210212 is a wasteful number, since it uses less digits than its factorization.

212021210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013915 (or 2013913 counting only the distinct ones).

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

Adding to 212021210212 its reverse (212012120212), we get a palindrome (424033330424).

The spelling of 212021210212 in words is "two hundred twelve billion, twenty-one million, two hundred ten thousand, two hundred twelve".