212223353121 has 24 divisors (see below), whose sum is σ = 330524550720. Its totient is φ = 130441008096.

The previous prime is 212223353087. The next prime is 212223353191. The reversal of 212223353121 is 121353322212.

212223353121 is a `hidden beast` number, since 2 + 12 + 2 + 2 + 335 + 312 + 1 = 666.

212223353121 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 212223353121 - 2⁹ = 212223352609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212223353191) 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 23 ways as a sum of consecutive naturals, for example, 999901 + ... + 1193418.

It is an arithmetic number, because the mean of its divisors is an integer number (13771856280).

Almost surely, 2^212223353121 is an apocalyptic number.

It is an amenable number.

212223353121 is a deficient number, since it is larger than the sum of its proper divisors (118301197599).

212223353121 is a wasteful number, since it uses less digits than its factorization.

212223353121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194165 (or 2194162 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

Adding to 212223353121 its reverse (121353322212), we get a palindrome (333576675333).

The spelling of 212223353121 in words is "two hundred twelve billion, two hundred twenty-three million, three hundred fifty-three thousand, one hundred twenty-one".