11200421220 has 96 divisors (see below), whose sum is σ = 31745884800. Its totient is φ = 2950262784.

The previous prime is 11200421213. The next prime is 11200421227. The reversal of 11200421220 is 2212400211.

It is an interprime number because it is at equal distance from previous prime (11200421213) and next prime (11200421227).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11200421220.

It is not an unprimeable number, because it can be changed into a prime (11200421227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3601026 + ... + 3604134.

It is an arithmetic number, because the mean of its divisors is an integer number (330686300).

Almost surely, 2^11200421220 is an apocalyptic number.

11200421220 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 11200421220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15872942400).

11200421220 is an abundant number, since it is smaller than the sum of its proper divisors (20545463580).

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

11200421220 is a wasteful number, since it uses less digits than its factorization.

11200421220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837 (or 3835 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 11200421220 its reverse (2212400211), we get a palindrome (13412821431).

The spelling of 11200421220 in words is "eleven billion, two hundred million, four hundred twenty-one thousand, two hundred twenty".