11212200220 has 72 divisors (see below), whose sum is σ = 25595117856. Its totient is φ = 4123821312.

The previous prime is 11212200203. The next prime is 11212200227. The reversal of 11212200220 is 2200221211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 11212200220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212200227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 882634 + ... + 895246.

It is an arithmetic number, because the mean of its divisors is an integer number (355487748).

Almost surely, 2^11212200220 is an apocalyptic number.

11212200220 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 11212200220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12797558928).

11212200220 is an abundant number, since it is smaller than the sum of its proper divisors (14382917636).

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

11212200220 is a wasteful number, since it uses less digits than its factorization.

11212200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12911 (or 12896 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 11212200220 its reverse (2200221211), we get a palindrome (13412421431).

The spelling of 11212200220 in words is "eleven billion, two hundred twelve million, two hundred thousand, two hundred twenty".