321212223012 has 24 divisors (see below), whose sum is σ = 749509561696. Its totient is φ = 107068687488.

The previous prime is 321212223011. The next prime is 321212223043. The reversal of 321212223012 is 210322212123.

It is a self number, because there is not a number n which added to its sum of digits gives 321212223012.

It is not an unprimeable number, because it can be changed into a prime (321212223011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479523 + ... + 934005.

Almost surely, 2^321212223012 is an apocalyptic number.

It is an amenable number.

321212223012 is an abundant number, since it is smaller than the sum of its proper divisors (428297338684).

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

321212223012 is a wasteful number, since it uses less digits than its factorization.

321212223012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513387 (or 513385 counting only the distinct ones).

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

Adding to 321212223012 its reverse (210322212123), we get a palindrome (531534435135).

The spelling of 321212223012 in words is "three hundred twenty-one billion, two hundred twelve million, two hundred twenty-three thousand, twelve".