23203211321 has 4 divisors (see below), whose sum is σ = 23203534452. Its totient is φ = 23202888192.

The previous prime is 23203211281. The next prime is 23203211363. The reversal of 23203211321 is 12311230232.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 22928016400 + 275194921 = 151420^2 + 16589^2 .

It is a cyclic number.

It is not a de Polignac number, because 23203211321 - 2¹⁰ = 23203210297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23203211293 and 23203211302.

It is not an unprimeable number, because it can be changed into a prime (23203217321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5 + ... + 215421.

It is an arithmetic number, because the mean of its divisors is an integer number (5800883613).

Almost surely, 2^23203211321 is an apocalyptic number.

It is an amenable number.

23203211321 is a deficient number, since it is larger than the sum of its proper divisors (323131).

23203211321 is a wasteful number, since it uses less digits than its factorization.

23203211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323130.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23203211321 its reverse (12311230232), we get a palindrome (35514441553).

The spelling of 23203211321 in words is "twenty-three billion, two hundred three million, two hundred eleven thousand, three hundred twenty-one".