2021143020066 has 12 divisors (see below), whose sum is σ = 4379143210182. Its totient is φ = 673714340016.

The previous prime is 2021143020023. The next prime is 2021143020067. The reversal of 2021143020066 is 6600203411202.

2021143020066 is a `hidden beast` number, since 2 + 0 + 21 + 1 + 430 + 200 + 6 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1654477650225 + 366665369841 = 1286265^2 + 605529^2 .

It is a super-2 number, since 2×2021143020066² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021143020067) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56142861651 + ... + 56142861686.

Almost surely, 2^{2021143020066} is an apocalyptic number.

2021143020066 is an abundant number, since it is smaller than the sum of its proper divisors (2358000190116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021143020066 is a wasteful number, since it uses less digits than its factorization.

2021143020066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112285723345 (or 112285723342 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 2021143020066 its reverse (6600203411202), we get a palindrome (8621346431268).

The spelling of 2021143020066 in words is "two trillion, twenty-one billion, one hundred forty-three million, twenty thousand, sixty-six".