2221100100 has 108 divisors (see below), whose sum is σ = 7060173120. Its totient is φ = 583934400.

The previous prime is 2221100081. The next prime is 2221100129. The reversal of 2221100100 is 10011222.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 46521 + ... + 81279.

Almost surely, 2^2221100100 is an apocalyptic number.

2221100100 is a gapful number since it is divisible by the number (20) 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 2221100100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3530086560).

2221100100 is an abundant number, since it is smaller than the sum of its proper divisors (4839073020).

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

2221100100 is a wasteful number, since it uses less digits than its factorization.

2221100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34850 (or 34840 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2221100100 is about 47128.5486727525. The cubic root of 2221100100 is about 1304.7361954096.

Adding to 2221100100 its reverse (10011222), we get a palindrome (2231111322).

The spelling of 2221100100 in words is "two billion, two hundred twenty-one million, one hundred thousand, one hundred".