11224312220 has 96 divisors (see below), whose sum is σ = 27688469760. Its totient is φ = 3776291840.

The previous prime is 11224312207. The next prime is 11224312249. The reversal of 11224312220 is 2221342211.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11224312192 and 11224312201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195227 + ... + 246093.

It is an arithmetic number, because the mean of its divisors is an integer number (288421560).

Almost surely, 2^11224312220 is an apocalyptic number.

11224312220 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 11224312220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13844234880).

11224312220 is an abundant number, since it is smaller than the sum of its proper divisors (16464157540).

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

11224312220 is a wasteful number, since it uses less digits than its factorization.

11224312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50963 (or 50961 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 11224312220 its reverse (2221342211), we get a palindrome (13445654431).

The spelling of 11224312220 in words is "eleven billion, two hundred twenty-four million, three hundred twelve thousand, two hundred twenty".