2021120201005 has 4 divisors (see below), whose sum is σ = 2425344241212. Its totient is φ = 1616896160800.

The previous prime is 2021120200997. The next prime is 2021120201021. The reversal of 2021120201005 is 5001020211202.

It is a happy number.

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 912871326249 + 1108248874756 = 955443^2 + 1052734^2 .

It is not a de Polignac number, because 2021120201005 - 2³ = 2021120200997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021120201005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202112020096 + ... + 202112020105.

It is an arithmetic number, because the mean of its divisors is an integer number (606336060303).

Almost surely, 2^{2021120201005} is an apocalyptic number.

It is an amenable number.

2021120201005 is a deficient number, since it is larger than the sum of its proper divisors (404224040207).

2021120201005 is an equidigital number, since it uses as much as digits as its factorization.

2021120201005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404224040206.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 2021120201005 its reverse (5001020211202), we get a palindrome (7022140412207).

The spelling of 2021120201005 in words is "two trillion, twenty-one billion, one hundred twenty million, two hundred one thousand, five".