2003001041521 has 4 divisors (see below), whose sum is σ = 2003003939700. Its totient is φ = 2002998143344.

The previous prime is 2003001041501. The next prime is 2003001041549. The reversal of 2003001041521 is 1251401003002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1660776041521 + 342225000000 = 1288711^2 + 585000^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003001041521 - 2²⁵ = 2002967487089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2003001041501) 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, 257715 + ... + 2018023.

It is an arithmetic number, because the mean of its divisors is an integer number (500750984925).

Almost surely, 2^{2003001041521} is an apocalyptic number.

It is an amenable number.

2003001041521 is a deficient number, since it is larger than the sum of its proper divisors (2898179).

2003001041521 is a wasteful number, since it uses less digits than its factorization.

2003001041521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2898178.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 2003001041521 its reverse (1251401003002), we get a palindrome (3254402044523).

The spelling of 2003001041521 in words is "two trillion, three billion, one million, forty-one thousand, five hundred twenty-one".