2101222112 has 72 divisors (see below), whose sum is σ = 4583916288. Its totient is φ = 947358720.

The previous prime is 2101222111. The next prime is 2101222121. The reversal of 2101222112 is 2112221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101222111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 489608 + ... + 493880.

It is an arithmetic number, because the mean of its divisors is an integer number (63665504).

Almost surely, 2^2101222112 is an apocalyptic number.

2101222112 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 2101222112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2291958144).

2101222112 is an abundant number, since it is smaller than the sum of its proper divisors (2482694176).

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

2101222112 is a wasteful number, since it uses less digits than its factorization.

2101222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4432 (or 4413 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2101222112 is about 45839.0893452302. The cubic root of 2101222112 is about 1280.8275312847.

Adding to 2101222112 its reverse (2112221012), we get a palindrome (4213443124).

The spelling of 2101222112 in words is "two billion, one hundred one million, two hundred twenty-two thousand, one hundred twelve".