20321120321 has 8 divisors (see below), whose sum is σ = 20819955744. Its totient is φ = 19822437280.

The previous prime is 20321120269. The next prime is 20321120329. The reversal of 20321120321 is 12302112302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20321120321 - 2¹⁴ = 20321103937 is a prime.

It is a super-2 number, since 2×20321120321² (a number of 21 digits) contains 22 as substring.

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 20321120321.

It is not an unprimeable number, because it can be changed into a prime (20321120329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260186 + ... + 329148.

It is an arithmetic number, because the mean of its divisors is an integer number (2602494468).

Almost surely, 2^20321120321 is an apocalyptic number.

It is an amenable number.

20321120321 is a deficient number, since it is larger than the sum of its proper divisors (498835423).

20321120321 is an equidigital number, since it uses as much as digits as its factorization.

20321120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76191.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20321120321 its reverse (12302112302), we get a palindrome (32623232623).

The spelling of 20321120321 in words is "twenty billion, three hundred twenty-one million, one hundred twenty thousand, three hundred twenty-one".