2021000011021 has 4 divisors (see below), whose sum is σ = 2021065128544. Its totient is φ = 2020934893500.

The previous prime is 2021000010959. The next prime is 2021000011039. The reversal of 2021000011021 is 1201100001202.

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.

It is a cyclic number.

It is not a de Polignac number, because 2021000011021 - 2³³ = 2012410076429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021000010989 and 2021000011007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021000011091) 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, 32512185 + ... + 32574286.

It is an arithmetic number, because the mean of its divisors is an integer number (505266282136).

Almost surely, 2^{2021000011021} is an apocalyptic number.

It is an amenable number.

2021000011021 is a deficient number, since it is larger than the sum of its proper divisors (65117523).

2021000011021 is an equidigital number, since it uses as much as digits as its factorization.

2021000011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65117522.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2021000011021 its reverse (1201100001202), we get a palindrome (3222100012223).

The spelling of 2021000011021 in words is "two trillion, twenty-one billion, eleven thousand, twenty-one".