2221322100 has 72 divisors (see below), whose sum is σ = 6431963328. Its totient is φ = 591897600.

The previous prime is 2221322071. The next prime is 2221322203. The reversal of 2221322100 is 12231222.

It is a happy number.

2221322100 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 (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2221322100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 603265 + ... + 606935.

It is an arithmetic number, because the mean of its divisors is an integer number (89332824).

Almost surely, 2^2221322100 is an apocalyptic number.

2221322100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221322100 is an abundant number, since it is smaller than the sum of its proper divisors (4210641228).

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

2221322100 is a wasteful number, since it uses less digits than its factorization.

2221322100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5705 (or 5698 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2221322100 is about 47130.9038742098. The cubic root of 2221322100 is about 1304.7796636269.

Adding to 2221322100 its reverse (12231222), we get a palindrome (2233553322).

The spelling of 2221322100 in words is "two billion, two hundred twenty-one million, three hundred twenty-two thousand, one hundred".