2100022220 has 48 divisors (see below), whose sum is σ = 4443586560. Its totient is φ = 833647296.

The previous prime is 2100022217. The next prime is 2100022229. The reversal of 2100022220 is 222200012.

It is not an unprimeable number, because it can be changed into a prime (2100022229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2135849 + ... + 2136831.

It is an arithmetic number, because the mean of its divisors is an integer number (92574720).

Almost surely, 2^2100022220 is an apocalyptic number.

2100022220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100022220 is an abundant number, since it is smaller than the sum of its proper divisors (2343564340).

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

2100022220 is a wasteful number, since it uses less digits than its factorization.

2100022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694 (or 1692 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 2100022220 is about 45825.9993889931. Note that the first 3 decimals coincide. The cubic root of 2100022220 is about 1280.5836815540.

Adding to 2100022220 its reverse (222200012), we get a palindrome (2322222232).

The spelling of 2100022220 in words is "two billion, one hundred million, twenty-two thousand, two hundred twenty".