321121213333201 has 4 divisors (see below), whose sum is σ = 321121266261412. Its totient is φ = 321121160404992.

The previous prime is 321121213333177. The next prime is 321121213333213. The reversal of 321121213333201 is 102333312121123.

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

It can be written as a sum of positive squares in 2 ways, for example, as 125544764264976 + 195576449068225 = 11204676^2 + 13984865^2 .

It is a cyclic number.

It is not a de Polignac number, because 321121213333201 - 2⁴⁷ = 180383724977873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321121213333201.

It is not an unprimeable number, because it can be changed into a prime (321121213333601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15978600 + ... + 29959273.

It is an arithmetic number, because the mean of its divisors is an integer number (80280316565353).

Almost surely, 2^{321121213333201} is an apocalyptic number.

It is an amenable number.

321121213333201 is a deficient number, since it is larger than the sum of its proper divisors (52928211).

321121213333201 is an equidigital number, since it uses as much as digits as its factorization.

321121213333201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52928210.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 321121213333201 its reverse (102333312121123), we get a palindrome (423454525454324).

The spelling of 321121213333201 in words is "three hundred twenty-one trillion, one hundred twenty-one billion, two hundred thirteen million, three hundred thirty-three thousand, two hundred one".