222100212 has 96 divisors (see below), whose sum is σ = 555206400. Its totient is φ = 68992000.

The previous prime is 222100211. The next prime is 222100231. The reversal of 222100212 is 212001222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222100211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2198962 + ... + 2199062.

It is an arithmetic number, because the mean of its divisors is an integer number (5783400).

Almost surely, 2^222100212 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 222100212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277603200).

222100212 is an abundant number, since it is smaller than the sum of its proper divisors (333106188).

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

222100212 is a wasteful number, since it uses less digits than its factorization.

222100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 222100212 is about 14903.0269408600. The cubic root of 222100212 is about 605.5959903396.

Adding to 222100212 its reverse (212001222), we get a palindrome (434101434).

The spelling of 222100212 in words is "two hundred twenty-two million, one hundred thousand, two hundred twelve".