2021012001021 has 32 divisors (see below), whose sum is σ = 2925109411840. Its totient is φ = 1233783036864.

The previous prime is 2021012001007. The next prime is 2021012001049. The reversal of 2021012001021 is 1201002101202.

It is not a de Polignac number, because 2021012001021 - 2⁵ = 2021012000989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2021012000988 and 2021012001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021012001061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85194600 + ... + 85218318.

It is an arithmetic number, because the mean of its divisors is an integer number (91409669120).

Almost surely, 2^{2021012001021} is an apocalyptic number.

It is an amenable number.

2021012001021 is a deficient number, since it is larger than the sum of its proper divisors (904097410819).

2021012001021 is a wasteful number, since it uses less digits than its factorization.

2021012001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41065.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2021012001021 its reverse (1201002101202), we get a palindrome (3222014102223).

The spelling of 2021012001021 in words is "two trillion, twenty-one billion, twelve million, one thousand, twenty-one".