212244321 has 16 divisors (see below), whose sum is σ = 300021248. Its totient is φ = 133228800.

The previous prime is 212244317. The next prime is 212244341. The reversal of 212244321 is 123442212.

212244321 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 212244321 - 2² = 212244317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212244341) 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, 27400 + ... + 34281.

It is an arithmetic number, because the mean of its divisors is an integer number (18751328).

Almost surely, 2^212244321 is an apocalyptic number.

It is an amenable number.

212244321 is a deficient number, since it is larger than the sum of its proper divisors (87776927).

212244321 is a wasteful number, since it uses less digits than its factorization.

212244321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61752.

The product of its digits is 768, while the sum is 21.

The square root of 212244321 is about 14568.6073802543. The cubic root of 212244321 is about 596.5021676850.

Adding to 212244321 its reverse (123442212), we get a palindrome (335686533).

The spelling of 212244321 in words is "two hundred twelve million, two hundred forty-four thousand, three hundred twenty-one".