212011220221021 has 8 divisors (see below), whose sum is σ = 231727533468704. Its totient is φ = 192781729522800.

The previous prime is 212011220220959. The next prime is 212011220221033. The reversal of 212011220221021 is 120122022110212.

212011220221021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212011220221021 - 2⁹ = 212011220220509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212011220221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011220221061) 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, 121705636455 + ... + 121705638196.

It is an arithmetic number, because the mean of its divisors is an integer number (28965941683588).

Almost surely, 2^{212011220221021} is an apocalyptic number.

It is an amenable number.

212011220221021 is a deficient number, since it is larger than the sum of its proper divisors (19716313247683).

212011220221021 is a wasteful number, since it uses less digits than its factorization.

212011220221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243411274731.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212011220221021 its reverse (120122022110212), we get a palindrome (332133242331233).

The spelling of 212011220221021 in words is "two hundred twelve trillion, eleven billion, two hundred twenty million, two hundred twenty-one thousand, twenty-one".