23201120321 has 4 divisors (see below), whose sum is σ = 23206897200. Its totient is φ = 23195343444.

The previous prime is 23201120309. The next prime is 23201120329. The reversal of 23201120321 is 12302110232.

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 a de Polignac number, because none of the positive numbers 2^k-23201120321 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 23201120321.

It is not an unprimeable number, because it can be changed into a prime (23201120329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2882411 + ... + 2890448.

It is an arithmetic number, because the mean of its divisors is an integer number (5801724300).

Almost surely, 2^23201120321 is an apocalyptic number.

It is an amenable number.

23201120321 is a deficient number, since it is larger than the sum of its proper divisors (5776879).

23201120321 is an equidigital number, since it uses as much as digits as its factorization.

23201120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5776878.

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

Adding to 23201120321 its reverse (12302110232), we get a palindrome (35503230553).

The spelling of 23201120321 in words is "twenty-three billion, two hundred one million, one hundred twenty thousand, three hundred twenty-one".