11121224420 has 24 divisors (see below), whose sum is σ = 23674500024. Its totient is φ = 4387550976.

The previous prime is 11121224377. The next prime is 11121224423. The reversal of 11121224420 is 2442212111.

It can be written as a sum of positive squares in 4 ways, for example, as 4427039296 + 6694185124 = 66536^2 + 81818^2 .

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 = 11121224392 and 11121224401.

It is not an unprimeable number, because it can be changed into a prime (11121224423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3807179 + ... + 3810098.

It is an arithmetic number, because the mean of its divisors is an integer number (986437501).

Almost surely, 2^11121224420 is an apocalyptic number.

11121224420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11121224420 is an abundant number, since it is smaller than the sum of its proper divisors (12553275604).

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

11121224420 is a wasteful number, since it uses less digits than its factorization.

11121224420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7617359 (or 7617357 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 11121224420 its reverse (2442212111), we get a palindrome (13563436531).

The spelling of 11121224420 in words is "eleven billion, one hundred twenty-one million, two hundred twenty-four thousand, four hundred twenty".