23203121321 has 8 divisors (see below), whose sum is σ = 23531764680. Its totient is φ = 22874769792.

The previous prime is 23203121311. The next prime is 23203121327. The reversal of 23203121321 is 12312130232.

It can be written as a sum of positive squares in 4 ways, for example, as 14169569296 + 9033552025 = 119036^2 + 95045^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 23203121321 - 2¹⁴ = 23203104937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23203121293 and 23203121302.

It is not an unprimeable number, because it can be changed into a prime (23203121327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89735 + ... + 233363.

It is an arithmetic number, because the mean of its divisors is an integer number (2941470585).

Almost surely, 2^23203121321 is an apocalyptic number.

It is an amenable number.

23203121321 is a deficient number, since it is larger than the sum of its proper divisors (328643359).

23203121321 is a wasteful number, since it uses less digits than its factorization.

23203121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145915.

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

Adding to 23203121321 its reverse (12312130232), we get a palindrome (35515251553).

It can be divided in two parts, 232031 and 21321, that added together give a palindrome (253352).

The spelling of 23203121321 in words is "twenty-three billion, two hundred three million, one hundred twenty-one thousand, three hundred twenty-one".