212322121 has 8 divisors (see below), whose sum is σ = 232382304. Its totient is φ = 192388320.

The previous prime is 212322113. The next prime is 212322127. The reversal of 212322121 is 121223212.

It is a happy number.

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 212322121 - 2³ = 212322113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212322095 and 212322104.

It is not an unprimeable number, because it can be changed into a prime (212322127) 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, 28060 + ... + 34813.

It is an arithmetic number, because the mean of its divisors is an integer number (29047788).

Almost surely, 2^212322121 is an apocalyptic number.

It is an amenable number.

212322121 is a deficient number, since it is larger than the sum of its proper divisors (20060183).

212322121 is a wasteful number, since it uses less digits than its factorization.

212322121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63191.

The product of its digits is 96, while the sum is 16.

The square root of 212322121 is about 14571.2772604189. The cubic root of 212322121 is about 596.5750431321.

Adding to 212322121 its reverse (121223212), we get a palindrome (333545333).

The spelling of 212322121 in words is "two hundred twelve million, three hundred twenty-two thousand, one hundred twenty-one".