2021011122005 has 4 divisors (see below), whose sum is σ = 2425213346412. Its totient is φ = 1616808897600.

The previous prime is 2021011121989. The next prime is 2021011122059. The reversal of 2021011122005 is 5002211101202.

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 957155025649 + 1063856096356 = 978343^2 + 1031434^2 .

It is not a de Polignac number, because 2021011122005 - 2⁴ = 2021011121989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202101112196 + ... + 202101112205.

It is an arithmetic number, because the mean of its divisors is an integer number (606303336603).

Almost surely, 2^{2021011122005} is an apocalyptic number.

It is an amenable number.

2021011122005 is a deficient number, since it is larger than the sum of its proper divisors (404202224407).

2021011122005 is an equidigital number, since it uses as much as digits as its factorization.

2021011122005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404202224406.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 2021011122005 its reverse (5002211101202), we get a palindrome (7023222223207).

The spelling of 2021011122005 in words is "two trillion, twenty-one billion, eleven million, one hundred twenty-two thousand, five".