11131221224 has 16 divisors (see below), whose sum is σ = 20873469120. Its totient is φ = 5564962800.

The previous prime is 11131221221. The next prime is 11131221239. The reversal of 11131221224 is 42212213111.

It is a junction number, because it is equal to n+sod(n) for n = 11131221196 and 11131221205.

It is not an unprimeable number, because it can be changed into a prime (11131221221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3602 + ... + 149249.

It is an arithmetic number, because the mean of its divisors is an integer number (1304591820).

Almost surely, 2^11131221224 is an apocalyptic number.

It is an amenable number.

11131221224 is a deficient number, since it is larger than the sum of its proper divisors (9742247896).

11131221224 is a wasteful number, since it uses less digits than its factorization.

11131221224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161960 (or 161956 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

Adding to 11131221224 its reverse (42212213111), we get a palindrome (53343434335).

The spelling of 11131221224 in words is "eleven billion, one hundred thirty-one million, two hundred twenty-one thousand, two hundred twenty-four".