2020403121521 has 8 divisors (see below), whose sum is σ = 2024617904064. Its totient is φ = 2016189126000.

The previous prime is 2020403121511. The next prime is 2020403121587. The reversal of 2020403121521 is 1251213040202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2020403121521 - 2¹⁰ = 2020403120497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020403121511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5090750 + ... + 5473256.

It is an arithmetic number, because the mean of its divisors is an integer number (253077238008).

Almost surely, 2^{2020403121521} is an apocalyptic number.

It is an amenable number.

2020403121521 is a deficient number, since it is larger than the sum of its proper divisors (4214782543).

2020403121521 is a wasteful number, since it uses less digits than its factorization.

2020403121521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393511.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 2020403121521 its reverse (1251213040202), we get a palindrome (3271616161723).

The spelling of 2020403121521 in words is "two trillion, twenty billion, four hundred three million, one hundred twenty-one thousand, five hundred twenty-one".