320233121221 has 16 divisors (see below), whose sum is σ = 349856575488. Its totient is φ = 291325708800.

The previous prime is 320233121203. The next prime is 320233121231. The reversal of 320233121221 is 122121332023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320233121221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320233121192 and 320233121201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320233121231) 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 15 ways as a sum of consecutive naturals, for example, 2415541 + ... + 2544661.

It is an arithmetic number, because the mean of its divisors is an integer number (21866035968).

Almost surely, 2^320233121221 is an apocalyptic number.

It is an amenable number.

320233121221 is a deficient number, since it is larger than the sum of its proper divisors (29623454267).

320233121221 is a wasteful number, since it uses less digits than its factorization.

320233121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131892.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 320233121221 its reverse (122121332023), we get a palindrome (442354453244).

The spelling of 320233121221 in words is "three hundred twenty billion, two hundred thirty-three million, one hundred twenty-one thousand, two hundred twenty-one".