212220220120221 has 16 divisors (see below), whose sum is σ = 299750244620544. Its totient is φ = 133093239404544.

The previous prime is 212220220120147. The next prime is 212220220120247. The reversal of 212220220120221 is 122021022022212.

212220220120221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212220220120221 - 2¹³ = 212220220112029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212220220120921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1008421396 + ... + 1008631821.

It is an arithmetic number, because the mean of its divisors is an integer number (18734390288784).

Almost surely, 2^{212220220120221} is an apocalyptic number.

It is an amenable number.

212220220120221 is a deficient number, since it is larger than the sum of its proper divisors (87530024500323).

212220220120221 is a wasteful number, since it uses less digits than its factorization.

212220220120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017055300.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 212220220120221 its reverse (122021022022212), we get a palindrome (334241242142433).

The spelling of 212220220120221 in words is "two hundred twelve trillion, two hundred twenty billion, two hundred twenty million, one hundred twenty thousand, two hundred twenty-one".