11213220100 has 72 divisors (see below), whose sum is σ = 24576552000. Its totient is φ = 4440508800.

The previous prime is 11213220047. The next prime is 11213220119. The reversal of 11213220100 is 102231211.

It is a super-2 number, since 2×11213220100² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7846186 + ... + 7847614.

It is an arithmetic number, because the mean of its divisors is an integer number (341341000).

Almost surely, 2^11213220100 is an apocalyptic number.

11213220100 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 11213220100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12288276000).

11213220100 is an abundant number, since it is smaller than the sum of its proper divisors (13363331900).

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

11213220100 is a wasteful number, since it uses less digits than its factorization.

11213220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173 (or 2166 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11213220100 its reverse (102231211), we get a palindrome (11315451311).

The spelling of 11213220100 in words is "eleven billion, two hundred thirteen million, two hundred twenty thousand, one hundred".