2222021100 has 144 divisors (see below), whose sum is σ = 7147320320. Its totient is φ = 529286400.

The previous prime is 2222021059. The next prime is 2222021161. The reversal of 2222021100 is 11202222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 111711 + ... + 130089.

Almost surely, 2^2222021100 is an apocalyptic number.

2222021100 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 2222021100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3573660160).

2222021100 is an abundant number, since it is smaller than the sum of its proper divisors (4925299220).

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

2222021100 is a wasteful number, since it uses less digits than its factorization.

2222021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18440 (or 18433 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2222021100 is about 47138.3188075264. The cubic root of 2222021100 is about 1304.9165108579.

Adding to 2222021100 its reverse (11202222), we get a palindrome (2233223322).

The spelling of 2222021100 in words is "two billion, two hundred twenty-two million, twenty-one thousand, one hundred".