20231120321 has 16 divisors (see below), whose sum is σ = 21232212480. Its totient is φ = 19240415040.

The previous prime is 20231120293. The next prime is 20231120363. The reversal of 20231120321 is 12302113202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20231120321 is a prime.

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 20231120321.

It is not an unprimeable number, because it can be changed into a prime (20231150321) 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, 4026791 + ... + 4031811.

It is an arithmetic number, because the mean of its divisors is an integer number (1327013280).

Almost surely, 2^20231120321 is an apocalyptic number.

It is an amenable number.

20231120321 is a deficient number, since it is larger than the sum of its proper divisors (1001092159).

20231120321 is a wasteful number, since it uses less digits than its factorization.

20231120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6016.

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

Adding to 20231120321 its reverse (12302113202), we get a palindrome (32533233523).

The spelling of 20231120321 in words is "twenty billion, two hundred thirty-one million, one hundred twenty thousand, three hundred twenty-one".