2001120044 has 24 divisors (see below), whose sum is σ = 4366080768. Its totient is φ = 779657040.

The previous prime is 2001120013. The next prime is 2001120047. The reversal of 2001120044 is 4400211002.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (2001120047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3248264 + ... + 3248879.

It is an arithmetic number, because the mean of its divisors is an integer number (181920032).

Almost surely, 2^2001120044 is an apocalyptic number.

It is an amenable number.

2001120044 is an abundant number, since it is smaller than the sum of its proper divisors (2364960724).

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

2001120044 is a wasteful number, since it uses less digits than its factorization.

2001120044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6497165 (or 6497163 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2001120044 is about 44733.8802698805. The cubic root of 2001120044 is about 1260.1562005059.

Adding to 2001120044 its reverse (4400211002), we get a palindrome (6401331046).

The spelling of 2001120044 in words is "two billion, one million, one hundred twenty thousand, forty-four".