2021021202005 has 8 divisors (see below), whose sum is σ = 2611781245752. Its totient is φ = 1492446426048.

The previous prime is 2021021202001. The next prime is 2021021202043. The reversal of 2021021202005 is 5002021201202.

It can be written as a sum of positive squares in 4 ways, for example, as 205906305361 + 1815114896644 = 453769^2 + 1347262^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021021202005 - 2² = 2021021202001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021021202001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15546316874 + ... + 15546317003.

It is an arithmetic number, because the mean of its divisors is an integer number (326472655719).

Almost surely, 2^{2021021202005} is an apocalyptic number.

It is an amenable number.

2021021202005 is a deficient number, since it is larger than the sum of its proper divisors (590760043747).

2021021202005 is a wasteful number, since it uses less digits than its factorization.

2021021202005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31092633895.

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

Adding to 2021021202005 its reverse (5002021201202), we get a palindrome (7023042403207).

The spelling of 2021021202005 in words is "two trillion, twenty-one billion, twenty-one million, two hundred two thousand, five".