1121224420 has 48 divisors (see below), whose sum is σ = 2383179120. Its totient is φ = 443068416.

The previous prime is 1121224397. The next prime is 1121224427. The reversal of 1121224420 is 244221211.

It can be written as a sum of positive squares in 8 ways, for example, as 207129664 + 914094756 = 14392^2 + 30234^2 .

It is not an unprimeable number, because it can be changed into a prime (1121224427) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 923734 + ... + 924946.

It is an arithmetic number, because the mean of its divisors is an integer number (49649565).

Almost surely, 2^1121224420 is an apocalyptic number.

1121224420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121224420 is an abundant number, since it is smaller than the sum of its proper divisors (1261954700).

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

1121224420 is a wasteful number, since it uses less digits than its factorization.

1121224420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744 (or 1742 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1121224420 is about 33484.6893370687. The cubic root of 1121224420 is about 1038.8771226432.

Adding to 1121224420 its reverse (244221211), we get a palindrome (1365445631).

The spelling of 1121224420 in words is "one billion, one hundred twenty-one million, two hundred twenty-four thousand, four hundred twenty".