11221201100 has 72 divisors (see below), whose sum is σ = 24680274528. Its totient is φ = 4427942400.

The previous prime is 11221201031. The next prime is 11221201111. The reversal of 11221201100 is 110212211.

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, 2892362 + ... + 2896238.

Almost surely, 2^11221201100 is an apocalyptic number.

11221201100 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 11221201100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12340137264).

11221201100 is an abundant number, since it is smaller than the sum of its proper divisors (13459073428).

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

11221201100 is a wasteful number, since it uses less digits than its factorization.

11221201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275 (or 4268 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11221201100 its reverse (110212211), we get a palindrome (11331413311).

The spelling of 11221201100 in words is "eleven billion, two hundred twenty-one million, two hundred one thousand, one hundred".