212223322121 has 4 divisors (see below), whose sum is σ = 212336751744. Its totient is φ = 212109892500.

The previous prime is 212223322049. The next prime is 212223322177. The reversal of 212223322121 is 121223322212.

It is a happy number.

212223322121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212223322121 - 2¹⁰ = 212223321097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212223322921) 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 3 ways as a sum of consecutive naturals, for example, 56712005 + ... + 56715746.

It is an arithmetic number, because the mean of its divisors is an integer number (53084187936).

Almost surely, 2^212223322121 is an apocalyptic number.

It is an amenable number.

212223322121 is a deficient number, since it is larger than the sum of its proper divisors (113429623).

212223322121 is a wasteful number, since it uses less digits than its factorization.

212223322121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113429622.

The product of its digits is 1152, while the sum is 23.

Adding to 212223322121 its reverse (121223322212), we get a palindrome (333446644333).

Subtracting from 212223322121 its reverse (121223322212), we obtain a palindrome (90999999909).

The spelling of 212223322121 in words is "two hundred twelve billion, two hundred twenty-three million, three hundred twenty-two thousand, one hundred twenty-one".