2020001021 has 8 divisors (see below), whose sum is σ = 2037674880. Its totient is φ = 2002369888.

The previous prime is 2020000987. The next prime is 2020001029. The reversal of 2020001021 is 1201000202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2020001021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020001029) 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, 88250 + ... + 108756.

It is an arithmetic number, because the mean of its divisors is an integer number (254709360).

Almost surely, 2^2020001021 is an apocalyptic number.

It is an amenable number.

2020001021 is a deficient number, since it is larger than the sum of its proper divisors (17673859).

2020001021 is a wasteful number, since it uses less digits than its factorization.

2020001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21363.

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

The square root of 2020001021 is about 44944.4214669629. The cubic root of 2020001021 is about 1264.1070778423.

Adding to 2020001021 its reverse (1201000202), we get a palindrome (3221001223).

The spelling of 2020001021 in words is "two billion, twenty million, one thousand, twenty-one".