321204143220442 has 8 divisors (see below), whose sum is σ = 482289470816436. Its totient is φ = 160440986281632.

The previous prime is 321204143220439. The next prime is 321204143220463. The reversal of 321204143220442 is 244022341402123.

It can be written as a sum of positive squares in 2 ways, for example, as 319385472506881 + 1818670713561 = 17871359^2 + 1348581^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 321204143220398 and 321204143220407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80542661803 + ... + 80542665790.

Almost surely, 2^{321204143220442} is an apocalyptic number.

321204143220442 is a deficient number, since it is larger than the sum of its proper divisors (161085327595994).

321204143220442 is a wasteful number, since it uses less digits than its factorization.

321204143220442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161085328592.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 321204143220442 its reverse (244022341402123), we get a palindrome (565226484622565).

The spelling of 321204143220442 in words is "three hundred twenty-one trillion, two hundred four billion, one hundred forty-three million, two hundred twenty thousand, four hundred forty-two".