2021020021011 has 4 divisors (see below), whose sum is σ = 2694693361352. Its totient is φ = 1347346680672.

The previous prime is 2021020021003. The next prime is 2021020021039. The reversal of 2021020021011 is 1101200201202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2021020021011 - 2³ = 2021020021003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021020021061) 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, 336836670166 + ... + 336836670171.

It is an arithmetic number, because the mean of its divisors is an integer number (673673340338).

Almost surely, 2^{2021020021011} is an apocalyptic number.

2021020021011 is a deficient number, since it is larger than the sum of its proper divisors (673673340341).

2021020021011 is an equidigital number, since it uses as much as digits as its factorization.

2021020021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673673340340.

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

Adding to 2021020021011 its reverse (1101200201202), we get a palindrome (3122220222213).

The spelling of 2021020021011 in words is "two trillion, twenty-one billion, twenty million, twenty-one thousand, eleven".