212243112 has 128 divisors (see below), whose sum is σ = 630144000. Its totient is φ = 66044160.

The previous prime is 212243107. The next prime is 212243153. The reversal of 212243112 is 211342212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193638 + ... + 194730.

It is an arithmetic number, because the mean of its divisors is an integer number (4923000).

Almost surely, 2^212243112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212243112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315072000).

212243112 is an abundant number, since it is smaller than the sum of its proper divisors (417900888).

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

212243112 is a wasteful number, since it uses less digits than its factorization.

212243112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168 (or 1158 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 212243112 is about 14568.5658868675. The cubic root of 212243112 is about 596.5010350712.

Adding to 212243112 its reverse (211342212), we get a palindrome (423585324).

It can be divided in two parts, 21224 and 3112, that added together give a square (24336 = 156²).

The spelling of 212243112 in words is "two hundred twelve million, two hundred forty-three thousand, one hundred twelve".