212021223112 has 32 divisors (see below), whose sum is σ = 397994616000. Its totient is φ = 105889408704.

The previous prime is 212021223109. The next prime is 212021223157. The reversal of 212021223112 is 211322120212.

It is a self number, because there is not a number n which added to its sum of digits gives 212021223112.

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, 34199389 + ... + 34205587.

It is an arithmetic number, because the mean of its divisors is an integer number (12437331750).

Almost surely, 2^212021223112 is an apocalyptic number.

It is an amenable number.

212021223112 is a deficient number, since it is larger than the sum of its proper divisors (185973392888).

212021223112 is a wasteful number, since it uses less digits than its factorization.

212021223112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10405 (or 10401 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212021223112 its reverse (211322120212), we get a palindrome (423343343324).

The spelling of 212021223112 in words is "two hundred twelve billion, twenty-one million, two hundred twenty-three thousand, one hundred twelve".