23121323320 has 16 divisors (see below), whose sum is σ = 52022977560. Its totient is φ = 9248529312.

The previous prime is 23121323279. The next prime is 23121323339. The reversal of 23121323320 is 2332312132.

It is a junction number, because it is equal to n+sod(n) for n = 23121323291 and 23121323300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289016502 + ... + 289016581.

Almost surely, 2^23121323320 is an apocalyptic number.

23121323320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121323320 is an abundant number, since it is smaller than the sum of its proper divisors (28901654240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23121323320 is a wasteful number, since it uses less digits than its factorization.

23121323320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578033094 (or 578033090 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 23121323320 its reverse (2332312132), we get a palindrome (25453635452).

The spelling of 23121323320 in words is "twenty-three billion, one hundred twenty-one million, three hundred twenty-three thousand, three hundred twenty".