2100222 has 64 divisors (see below), whose sum is σ = 5184000. Its totient is φ = 627264.

The previous prime is 2100221. The next prime is 2100227. The reversal of 2100222 is 2220012.

2100222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23554 + ... + 23642.

It is an arithmetic number, because the mean of its divisors is an integer number (81000).

2^2100222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2100222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2592000).

2100222 is an abundant number, since it is smaller than the sum of its proper divisors (3083778).

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

2100222 is a wasteful number, since it uses less digits than its factorization.

2100222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 2100222 is about 1449.2142698718. The cubic root of 2100222 is about 128.0624288568.

Adding to 2100222 its reverse (2220012), we get a palindrome (4320234).

The spelling of 2100222 in words is "two million, one hundred thousand, two hundred twenty-two".