11221144002 has 40 divisors (see below), whose sum is σ = 25149744972. Its totient is φ = 3739478400.

The previous prime is 11221144001. The next prime is 11221144019. The reversal of 11221144002 is 20044112211.

11221144002 is a `hidden beast` number, since 1 + 1 + 221 + 1 + 440 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10673162721 + 547981281 = 103311^2 + 23409^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11221144001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1220302 + ... + 1229462.

Almost surely, 2^11221144002 is an apocalyptic number.

11221144002 is an abundant number, since it is smaller than the sum of its proper divisors (13928600970).

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

11221144002 is an equidigital number, since it uses as much as digits as its factorization.

11221144002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16736 (or 16727 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11221144002 its reverse (20044112211), we get a palindrome (31265256213).

The spelling of 11221144002 in words is "eleven billion, two hundred twenty-one million, one hundred forty-four thousand, two".