11221100 has 54 divisors (see below), whose sum is σ = 26829012. Its totient is φ = 4040000.

The previous prime is 11221097. The next prime is 11221103. The reversal of 11221100 is 112211.

11221100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11221097) and next prime (11221103).

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11221103) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 111050 + ... + 111150.

Almost surely, 2^11221100 is an apocalyptic number.

11221100 is a gapful number since it is divisible by the number (10) 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 11221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13414506).

11221100 is an abundant number, since it is smaller than the sum of its proper divisors (15607912).

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

11221100 is a wasteful number, since it uses less digits than its factorization.

11221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 11221100 is about 3349.7910382590. The cubic root of 11221100 is about 223.8782022806.

Adding to 11221100 its reverse (112211), we get a palindrome (11333311).

Subtracting from 11221100 its reverse (112211), we obtain a square (11108889 = 3333²).

Multiplying 11221100 by its reverse (112211), we get a square (1259130852100 = 1122110²).

11221100 divided by its reverse (112211) gives a square (100 = 10²).

It can be divided in two parts, 1122 and 1100, that added together give a palindrome (2222).

The spelling of 11221100 in words is "eleven million, two hundred twenty-one thousand, one hundred".