23121013321 has 8 divisors (see below), whose sum is σ = 26632079360. Its totient is φ = 19661963328.

The previous prime is 23121013313. The next prime is 23121013343. The reversal of 23121013321 is 12331012132.

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

It is not a de Polignac number, because 23121013321 - 2³ = 23121013313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23121013351) 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, 13003056 + ... + 13004833.

It is an arithmetic number, because the mean of its divisors is an integer number (3329009920).

Almost surely, 2^23121013321 is an apocalyptic number.

It is an amenable number.

23121013321 is a deficient number, since it is larger than the sum of its proper divisors (3511066039).

23121013321 is a wasteful number, since it uses less digits than its factorization.

23121013321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26008023.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 23121013321 its reverse (12331012132), we get a palindrome (35452025453).

The spelling of 23121013321 in words is "twenty-three billion, one hundred twenty-one million, thirteen thousand, three hundred twenty-one".