11221100100 has 360 divisors, whose sum is σ = 42155718528. Its totient is φ = 2528755200.

The previous prime is 11221100081. The next prime is 11221100141. The reversal of 11221100100 is 100112211.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4137745 + ... + 4140455.

Almost surely, 2^11221100100 is an apocalyptic number.

11221100100 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 11221100100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21077859264).

11221100100 is an abundant number, since it is smaller than the sum of its proper divisors (30934618428).

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

11221100100 is a wasteful number, since it uses less digits than its factorization.

11221100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817 (or 2801 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11221100100 its reverse (100112211), we get a palindrome (11321212311).

The spelling of 11221100100 in words is "eleven billion, two hundred twenty-one million, one hundred thousand, one hundred".