321204505042 has 4 divisors (see below), whose sum is σ = 481806757566. Its totient is φ = 160602252520.

The previous prime is 321204505009. The next prime is 321204505051. The reversal of 321204505042 is 240505402123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 204239821041 + 116964684001 = 451929^2 + 342001^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 321204505042.

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 as a sum of consecutive naturals, namely, 80301126259 + ... + 80301126262.

Almost surely, 2^321204505042 is an apocalyptic number.

321204505042 is a deficient number, since it is larger than the sum of its proper divisors (160602252524).

321204505042 is a wasteful number, since it uses less digits than its factorization.

321204505042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160602252523.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 321204505042 its reverse (240505402123), we get a palindrome (561709907165).

The spelling of 321204505042 in words is "three hundred twenty-one billion, two hundred four million, five hundred five thousand, forty-two".