2221100120 has 32 divisors (see below), whose sum is σ = 4999410720. Its totient is φ = 888096000.

The previous prime is 2221100081. The next prime is 2221100129. The reversal of 2221100120 is 210011222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221100129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110789 + ... + 129291.

It is an arithmetic number, because the mean of its divisors is an integer number (156231585).

Almost surely, 2^2221100120 is an apocalyptic number.

2221100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221100120 is an abundant number, since it is smaller than the sum of its proper divisors (2778310600).

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

2221100120 is a wasteful number, since it uses less digits than its factorization.

2221100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21515 (or 21511 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2221100120 is about 47128.5488849381. The cubic root of 2221100120 is about 1304.7361993258.

Adding to 2221100120 its reverse (210011222), we get a palindrome (2431111342).

The spelling of 2221100120 in words is "two billion, two hundred twenty-one million, one hundred thousand, one hundred twenty".