2101224220 has 24 divisors (see below), whose sum is σ = 4495829184. Its totient is φ = 824630976.

The previous prime is 2101224217. The next prime is 2101224221. The reversal of 2101224220 is 224221012.

It is a junction number, because it is equal to n+sod(n) for n = 2101224194 and 2101224203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101224221) 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 7 ways as a sum of consecutive naturals, for example, 990084 + ... + 992203.

It is an arithmetic number, because the mean of its divisors is an integer number (187326216).

Almost surely, 2^2101224220 is an apocalyptic number.

2101224220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101224220 is an abundant number, since it is smaller than the sum of its proper divisors (2394604964).

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

2101224220 is a wasteful number, since it uses less digits than its factorization.

2101224220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982349 (or 1982347 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2101224220 is about 45839.1123387005. The cubic root of 2101224220 is about 1280.8279596042.

Adding to 2101224220 its reverse (224221012), we get a palindrome (2325445232).

The spelling of 2101224220 in words is "two billion, one hundred one million, two hundred twenty-four thousand, two hundred twenty".