321205221042 has 16 divisors (see below), whose sum is σ = 642416236320. Its totient is φ = 107067441312.

The previous prime is 321205221041. The next prime is 321205221049. The reversal of 321205221042 is 240122502123.

It is not an unprimeable number, because it can be changed into a prime (321205221041) 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, 879753 + ... + 1190115.

It is an arithmetic number, because the mean of its divisors is an integer number (40151014770).

Almost surely, 2^321205221042 is an apocalyptic number.

321205221042 is an abundant number, since it is smaller than the sum of its proper divisors (321211015278).

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

321205221042 is a wasteful number, since it uses less digits than its factorization.

321205221042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482857.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 321205221042 its reverse (240122502123), we get a palindrome (561327723165).

The spelling of 321205221042 in words is "three hundred twenty-one billion, two hundred five million, two hundred twenty-one thousand, forty-two".