23130212321 has 4 divisors (see below), whose sum is σ = 23174608644. Its totient is φ = 23085816000.

The previous prime is 23130212299. The next prime is 23130212333. The reversal of 23130212321 is 12321203132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16543104400 + 6587107921 = 128620^2 + 81161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23130212321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23130212293 and 23130212302.

It is not an unprimeable number, because it can be changed into a prime (23130212351) 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 3 ways as a sum of consecutive naturals, for example, 22197380 + ... + 22198421.

It is an arithmetic number, because the mean of its divisors is an integer number (5793652161).

Almost surely, 2^23130212321 is an apocalyptic number.

It is an amenable number.

23130212321 is a deficient number, since it is larger than the sum of its proper divisors (44396323).

23130212321 is an equidigital number, since it uses as much as digits as its factorization.

23130212321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44396322.

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

Adding to 23130212321 its reverse (12321203132), we get a palindrome (35451415453).

The spelling of 23130212321 in words is "twenty-three billion, one hundred thirty million, two hundred twelve thousand, three hundred twenty-one".