2020201021 has 4 divisors (see below), whose sum is σ = 2108035872. Its totient is φ = 1932366172.

The previous prime is 2020200983. The next prime is 2020201033. The reversal of 2020201021 is 1201020202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1201020202 = 2 ⋅600510101.

It is a cyclic number.

It is not a de Polignac number, because 2020201021 - 2⁷ = 2020200893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2020200989 and 2020201007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020201321) 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 3 ways as a sum of consecutive naturals, for example, 43917391 + ... + 43917436.

It is an arithmetic number, because the mean of its divisors is an integer number (527008968).

Almost surely, 2^2020201021 is an apocalyptic number.

It is an amenable number.

2020201021 is a deficient number, since it is larger than the sum of its proper divisors (87834851).

2020201021 is an equidigital number, since it uses as much as digits as its factorization.

2020201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87834850.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2020201021 is about 44946.6463821273. The cubic root of 2020201021 is about 1264.1487961499.

Adding to 2020201021 its reverse (1201020202), we get a palindrome (3221221223).

The spelling of 2020201021 in words is "two billion, twenty million, two hundred one thousand, twenty-one".