321120221021 has 4 divisors (see below), whose sum is σ = 321153271200. Its totient is φ = 321087170844.

The previous prime is 321120220987. The next prime is 321120221057. The reversal of 321120221021 is 120122021123.

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 321120221021 - 2¹⁰ = 321120219997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321120221221) 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 3 ways as a sum of consecutive naturals, for example, 16510511 + ... + 16529948.

It is an arithmetic number, because the mean of its divisors is an integer number (80288317800).

Almost surely, 2^321120221021 is an apocalyptic number.

It is an amenable number.

321120221021 is a deficient number, since it is larger than the sum of its proper divisors (33050179).

321120221021 is an equidigital number, since it uses as much as digits as its factorization.

321120221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33050178.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 321120221021 its reverse (120122021123), we get a palindrome (441242242144).

The spelling of 321120221021 in words is "three hundred twenty-one billion, one hundred twenty million, two hundred twenty-one thousand, twenty-one".