2020021001 has 4 divisors (see below), whose sum is σ = 2020129152. Its totient is φ = 2019912852.

The previous prime is 2020020991. The next prime is 2020021009. The reversal of 2020021001 is 1001200202.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1001200202 = 2 ⋅500600101.

It is a cyclic number.

It is not a de Polignac number, because 2020021001 - 2¹⁰ = 2020019977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2020021001.

It is not an unprimeable number, because it can be changed into a prime (2020021009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18065 + ... + 66078.

It is an arithmetic number, because the mean of its divisors is an integer number (505032288).

Almost surely, 2^2020021001 is an apocalyptic number.

It is an amenable number.

2020021001 is a deficient number, since it is larger than the sum of its proper divisors (108151).

2020021001 is an equidigital number, since it uses as much as digits as its factorization.

2020021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108150.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 2020021001 is about 44944.6437409398. The cubic root of 2020021001 is about 1264.1112456250. Note that the first 3 decimals are identical.

Adding to 2020021001 its reverse (1001200202), we get a palindrome (3021221203).

The spelling of 2020021001 in words is "two billion, twenty million, twenty-one thousand, one".