321310320121 has 4 divisors (see below), whose sum is σ = 367211794432. Its totient is φ = 275408845812.

The previous prime is 321310320103. The next prime is 321310320203. The reversal of 321310320121 is 121023013123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321310320121 - 2²¹ = 321308222969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321310329121) by changing a digit.

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, 22950737145 + ... + 22950737158.

It is an arithmetic number, because the mean of its divisors is an integer number (91802948608).

Almost surely, 2^321310320121 is an apocalyptic number.

It is an amenable number.

321310320121 is a deficient number, since it is larger than the sum of its proper divisors (45901474311).

321310320121 is an equidigital number, since it uses as much as digits as its factorization.

321310320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45901474310.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 321310320121 its reverse (121023013123), we get a palindrome (442333333244).

The spelling of 321310320121 in words is "three hundred twenty-one billion, three hundred ten million, three hundred twenty thousand, one hundred twenty-one".