320221121221021 has 16 divisors (see below), whose sum is σ = 360177135278400. Its totient is φ = 282902768011008.

The previous prime is 320221121221009. The next prime is 320221121221073. The reversal of 320221121221021 is 120122121122023.

It is a cyclic number.

It is not a de Polignac number, because 320221121221021 - 2⁹ = 320221121220509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320221121220983 and 320221121221001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320221121221091) 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 15 ways as a sum of consecutive naturals, for example, 4547655895 + ... + 4547726308.

It is an arithmetic number, because the mean of its divisors is an integer number (22511070954900).

Almost surely, 2^{320221121221021} is an apocalyptic number.

It is an amenable number.

320221121221021 is a deficient number, since it is larger than the sum of its proper divisors (39956014057379).

320221121221021 is a wasteful number, since it uses less digits than its factorization.

320221121221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9095382348.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 320221121221021 its reverse (120122121122023), we get a palindrome (440343242343044).

The spelling of 320221121221021 in words is "three hundred twenty trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty-one".