212221021112 has 16 divisors (see below), whose sum is σ = 407168238840. Its totient is φ = 103642824096.

The previous prime is 212221021099. The next prime is 212221021139. The reversal of 212221021112 is 211120122212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308460443 + ... + 308461130.

Almost surely, 2^212221021112 is an apocalyptic number.

It is an amenable number.

212221021112 is a deficient number, since it is larger than the sum of its proper divisors (194947217728).

212221021112 is a wasteful number, since it uses less digits than its factorization.

212221021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616921622 (or 616921618 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212221021112 its reverse (211120122212), we get a palindrome (423341143324).

The spelling of 212221021112 in words is "two hundred twelve billion, two hundred twenty-one million, twenty-one thousand, one hundred twelve".