2220222100 has 72 divisors (see below), whose sum is σ = 5114157048. Its totient is φ = 833740800.

The previous prime is 2220222089. The next prime is 2220222127. The reversal of 2220222100 is 12220222.

It can be written as a sum of positive squares in 12 ways, for example, as 572836356 + 1647385744 = 23934^2 + 40588^2 .

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, 782284 + ... + 785116.

It is an arithmetic number, because the mean of its divisors is an integer number (71029959).

Almost surely, 2^2220222100 is an apocalyptic number.

2220222100 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 2220222100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2557078524).

2220222100 is an abundant number, since it is smaller than the sum of its proper divisors (2893934948).

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

2220222100 is a wasteful number, since it uses less digits than its factorization.

2220222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325 (or 3318 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2220222100 is about 47119.2328036015. The cubic root of 2220222100 is about 1304.5642521822.

Adding to 2220222100 its reverse (12220222), we get a palindrome (2232442322).

The spelling of 2220222100 in words is "two billion, two hundred twenty million, two hundred twenty-two thousand, one hundred".