321210212 has 6 divisors (see below), whose sum is σ = 562117878. Its totient is φ = 160605104.

The previous prime is 321210191. The next prime is 321210229. The reversal of 321210212 is 212012123.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 309197056 + 12013156 = 17584^2 + 3466^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40151273 + ... + 40151280.

It is an arithmetic number, because the mean of its divisors is an integer number (93686313).

Almost surely, 2^321210212 is an apocalyptic number.

It is an amenable number.

321210212 is a deficient number, since it is larger than the sum of its proper divisors (240907666).

321210212 is a wasteful number, since it uses less digits than its factorization.

321210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80302557 (or 80302555 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 321210212 is about 17922.3383519004. The cubic root of 321210212 is about 684.8515578676.

Adding to 321210212 its reverse (212012123), we get a palindrome (533222335).

The spelling of 321210212 in words is "three hundred twenty-one million, two hundred ten thousand, two hundred twelve".