212102002020021 has 8 divisors (see below), whose sum is σ = 282803204086080. Its totient is φ = 141401067316992.

The previous prime is 212102002020019. The next prime is 212102002020109. The reversal of 212102002020021 is 120020200201212.

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

It is not a de Polignac number, because 212102002020021 - 2¹ = 212102002020019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102002020121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64982316 + ... + 68168213.

It is an arithmetic number, because the mean of its divisors is an integer number (35350400510760).

Almost surely, 2^{212102002020021} is an apocalyptic number.

It is an amenable number.

212102002020021 is a deficient number, since it is larger than the sum of its proper divisors (70701202066059).

212102002020021 is a wasteful number, since it uses less digits than its factorization.

212102002020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133681515.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212102002020021 its reverse (120020200201212), we get a palindrome (332122202221233).

The spelling of 212102002020021 in words is "two hundred twelve trillion, one hundred two billion, two million, twenty thousand, twenty-one".