212234321 has 4 divisors (see below), whose sum is σ = 228560052. Its totient is φ = 195908592.

The previous prime is 212234303. The next prime is 212234333. The reversal of 212234321 is 123432212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36300625 + 175933696 = 6025^2 + 13264^2 .

It is a cyclic number.

It is not a de Polignac number, because 212234321 - 2¹⁰ = 212233297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212234293 and 212234302.

It is not an unprimeable number, because it can be changed into a prime (212234371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8162846 + ... + 8162871.

It is an arithmetic number, because the mean of its divisors is an integer number (57140013).

Almost surely, 2^212234321 is an apocalyptic number.

It is an amenable number.

212234321 is a deficient number, since it is larger than the sum of its proper divisors (16325731).

212234321 is a wasteful number, since it uses less digits than its factorization.

212234321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16325730.

The product of its digits is 576, while the sum is 20.

The square root of 212234321 is about 14568.2641725087. The cubic root of 212234321 is about 596.4927993693.

Adding to 212234321 its reverse (123432212), we get a palindrome (335666533).

The spelling of 212234321 in words is "two hundred twelve million, two hundred thirty-four thousand, three hundred twenty-one".