212220230321 has 12 divisors (see below), whose sum is σ = 233298611700. Its totient is φ = 192901225440.

The previous prime is 212220230273. The next prime is 212220230329. The reversal of 212220230321 is 123032022212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64841020321 + 147379210000 = 254639^2 + 383900^2 .

It is not a de Polignac number, because 212220230321 - 2¹⁰ = 212220229297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212220230293 and 212220230302.

It is not an unprimeable number, because it can be changed into a prime (212220230329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 802715 + ... + 1033823.

It is an arithmetic number, because the mean of its divisors is an integer number (19441550975).

Almost surely, 2^212220230321 is an apocalyptic number.

It is an amenable number.

212220230321 is a deficient number, since it is larger than the sum of its proper divisors (21078381379).

212220230321 is a wasteful number, since it uses less digits than its factorization.

212220230321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238720 (or 238709 counting only the distinct ones).

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

Adding to 212220230321 its reverse (123032022212), we get a palindrome (335252252533).

The spelling of 212220230321 in words is "two hundred twelve billion, two hundred twenty million, two hundred thirty thousand, three hundred twenty-one".