321213211100 has 18 divisors (see below), whose sum is σ = 697032668304. Its totient is φ = 128485284400.

The previous prime is 321213211049. The next prime is 321213211171. The reversal of 321213211100 is 1112312123.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1606065956 + ... + 1606066155.

It is an arithmetic number, because the mean of its divisors is an integer number (38724037128).

Almost surely, 2^321213211100 is an apocalyptic number.

It is an amenable number.

321213211100 is an abundant number, since it is smaller than the sum of its proper divisors (375819457204).

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

321213211100 is a wasteful number, since it uses less digits than its factorization.

321213211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212132125 (or 3212132118 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 321213211100 its reverse (1112312123), we get a palindrome (322325523223).

The spelling of 321213211100 in words is "three hundred twenty-one billion, two hundred thirteen million, two hundred eleven thousand, one hundred".