2001220001440 has 96 divisors (see below), whose sum is σ = 5381937219456. Its totient is φ = 696076508160.

The previous prime is 2001220001437. The next prime is 2001220001497. The reversal of 2001220001440 is 441000221002.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24678147 + ... + 24759106.

It is an arithmetic number, because the mean of its divisors is an integer number (56061846036).

Almost surely, 2^{2001220001440} is an apocalyptic number.

2001220001440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001220001440 is an abundant number, since it is smaller than the sum of its proper divisors (3380717218016).

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

2001220001440 is a wasteful number, since it uses less digits than its factorization.

2001220001440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49437302 (or 49437294 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2001220001440 its reverse (441000221002), we get a palindrome (2442220222442).

The spelling of 2001220001440 in words is "two trillion, one billion, two hundred twenty million, one thousand, four hundred forty".