212222100112 has 80 divisors (see below), whose sum is σ = 454954631040. Its totient is φ = 95097728000.

The previous prime is 212222100071. The next prime is 212222100119. The reversal of 212222100112 is 211001222212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (212222100119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4116189 + ... + 4167427.

It is an arithmetic number, because the mean of its divisors is an integer number (5686932888).

Almost surely, 2^212222100112 is an apocalyptic number.

212222100112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212222100112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227477315520).

212222100112 is an abundant number, since it is smaller than the sum of its proper divisors (242732530928).

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

212222100112 is a wasteful number, since it uses less digits than its factorization.

212222100112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51592 (or 51586 counting only the distinct ones).

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

Adding to 212222100112 its reverse (211001222212), we get a palindrome (423223322324).

It can be divided in two parts, 212222100 and 112, that added together give a palindrome (212222212).

The spelling of 212222100112 in words is "two hundred twelve billion, two hundred twenty-two million, one hundred thousand, one hundred twelve".