2021020010021 has 8 divisors (see below), whose sum is σ = 2088376179744. Its totient is φ = 1954334051280.

The previous prime is 2021020010003. The next prime is 2021020010059. The reversal of 2021020010021 is 1200100201202.

It is a happy number.

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 2021020010021 - 2¹⁴ = 2021019993637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021020009984 and 2021020010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021020010521) 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 7 ways as a sum of consecutive naturals, for example, 167546615 + ... + 167558676.

It is an arithmetic number, because the mean of its divisors is an integer number (261047022468).

Almost surely, 2^{2021020010021} is an apocalyptic number.

It is an amenable number.

2021020010021 is a deficient number, since it is larger than the sum of its proper divisors (67356169723).

2021020010021 is a wasteful number, since it uses less digits than its factorization.

2021020010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335105491.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2021020010021 its reverse (1200100201202), we get a palindrome (3221120211223).

The spelling of 2021020010021 in words is "two trillion, twenty-one billion, twenty million, ten thousand, twenty-one".