321210212312 has 128 divisors (see below), whose sum is σ = 714923366400. Its totient is φ = 133668403200.

The previous prime is 321210212303. The next prime is 321210212327. The reversal of 321210212312 is 213212012123.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40062128 + ... + 40070144.

It is an arithmetic number, because the mean of its divisors is an integer number (5585338800).

Almost surely, 2^321210212312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321210212312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357461683200).

321210212312 is an abundant number, since it is smaller than the sum of its proper divisors (393713154088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321210212312 is a wasteful number, since it uses less digits than its factorization.

321210212312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8857 (or 8853 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 321210212312 its reverse (213212012123), we get a palindrome (534422224435).

The spelling of 321210212312 in words is "three hundred twenty-one billion, two hundred ten million, two hundred twelve thousand, three hundred twelve".