2021002112005 has 4 divisors (see below), whose sum is σ = 2425202534412. Its totient is φ = 1616801689600.

The previous prime is 2021002111991. The next prime is 2021002112033. The reversal of 2021002112005 is 5002112001202.

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 779473562884 + 1241528549121 = 882878^2 + 1114239^2 .

It is not a de Polignac number, because 2021002112005 - 2²⁷ = 2020867894277 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 2021002112005.

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, 202100211196 + ... + 202100211205.

It is an arithmetic number, because the mean of its divisors is an integer number (606300633603).

Almost surely, 2^{2021002112005} is an apocalyptic number.

It is an amenable number.

2021002112005 is a deficient number, since it is larger than the sum of its proper divisors (404200422407).

2021002112005 is an equidigital number, since it uses as much as digits as its factorization.

2021002112005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404200422406.

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

Adding to 2021002112005 its reverse (5002112001202), we get a palindrome (7023114113207).

The spelling of 2021002112005 in words is "two trillion, twenty-one billion, two million, one hundred twelve thousand, five".