321021043212 has 24 divisors (see below), whose sum is σ = 754437947200. Its totient is φ = 106237179216.

The previous prime is 321021043199. The next prime is 321021043219. The reversal of 321021043212 is 212340120123.

It is not an unprimeable number, because it can be changed into a prime (321021043219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96227662 + ... + 96230997.

Almost surely, 2^321021043212 is an apocalyptic number.

It is an amenable number.

321021043212 is an abundant number, since it is smaller than the sum of its proper divisors (433416903988).

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

321021043212 is a wasteful number, since it uses less digits than its factorization.

321021043212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192458805 (or 192458803 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 321021043212 its reverse (212340120123), we get a palindrome (533361163335).

The spelling of 321021043212 in words is "three hundred twenty-one billion, twenty-one million, forty-three thousand, two hundred twelve".