212021021212 has 48 divisors (see below), whose sum is σ = 498175276032. Its totient is φ = 76251314880.

The previous prime is 212021021159. The next prime is 212021021239. The reversal of 212021021212 is 212120120212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26472148 + ... + 26480155.

It is an arithmetic number, because the mean of its divisors is an integer number (10378651584).

Almost surely, 2^212021021212 is an apocalyptic number.

212021021212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212021021212 is an abundant number, since it is smaller than the sum of its proper divisors (286154254820).

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

212021021212 is a wasteful number, since it uses less digits than its factorization.

212021021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52952338 (or 52952336 counting only the distinct ones).

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

Adding to 212021021212 its reverse (212120120212), we get a palindrome (424141141424).

The spelling of 212021021212 in words is "two hundred twelve billion, twenty-one million, twenty-one thousand, two hundred twelve".