2021020212005 has 4 divisors (see below), whose sum is σ = 2425224254412. Its totient is φ = 1616816169600.

The previous prime is 2021020211999. The next prime is 2021020212007. The reversal of 2021020212005 is 5002120201202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 403689953956 + 1617330258049 = 635366^2 + 1271743^2 .

It is not a de Polignac number, because 2021020212005 - 2⁴ = 2021020211989 is a prime.

It is a super-2 number, since 2×2021020212005² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021020212007) 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, 202102021196 + ... + 202102021205.

It is an arithmetic number, because the mean of its divisors is an integer number (606306063603).

Almost surely, 2^{2021020212005} is an apocalyptic number.

It is an amenable number.

2021020212005 is a deficient number, since it is larger than the sum of its proper divisors (404204042407).

2021020212005 is an equidigital number, since it uses as much as digits as its factorization.

2021020212005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404204042406.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 2021020212005 its reverse (5002120201202), we get a palindrome (7023140413207).

The spelling of 2021020212005 in words is "two trillion, twenty-one billion, twenty million, two hundred twelve thousand, five".