212313321 has 24 divisors (see below), whose sum is σ = 346095360. Its totient is φ = 124236000.

The previous prime is 212313319. The next prime is 212313331. The reversal of 212313321 is 123313212.

It is not a de Polignac number, because 212313321 - 2¹ = 212313319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212313294 and 212313303.

It is not an unprimeable number, because it can be changed into a prime (212313301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34105 + ... + 39846.

It is an arithmetic number, because the mean of its divisors is an integer number (14420640).

Almost surely, 2^212313321 is an apocalyptic number.

It is an amenable number.

212313321 is a deficient number, since it is larger than the sum of its proper divisors (133782039).

212313321 is a wasteful number, since it uses less digits than its factorization.

212313321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73997 (or 73994 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 212313321 is about 14570.9752933700. The cubic root of 212313321 is about 596.5668010440.

Adding to 212313321 its reverse (123313212), we get a palindrome (335626533).

The spelling of 212313321 in words is "two hundred twelve million, three hundred thirteen thousand, three hundred twenty-one".