23121440343 has 12 divisors (see below), whose sum is σ = 33492251520. Its totient is φ = 15370624896.

The previous prime is 23121440297. The next prime is 23121440357. The reversal of 23121440343 is 34304412132.

23121440343 is a `hidden beast` number, since 2 + 3 + 1 + 214 + 403 + 43 = 666.

It is not a de Polignac number, because 23121440343 - 2²⁵ = 23087885911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121440383) 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 11 ways as a sum of consecutive naturals, for example, 3635703 + ... + 3642056.

It is an arithmetic number, because the mean of its divisors is an integer number (2791020960).

Almost surely, 2^23121440343 is an apocalyptic number.

23121440343 is a deficient number, since it is larger than the sum of its proper divisors (10370811177).

23121440343 is a wasteful number, since it uses less digits than its factorization.

23121440343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7278118 (or 7278115 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 23121440343 its reverse (34304412132), we get a palindrome (57425852475).

The spelling of 23121440343 in words is "twenty-three billion, one hundred twenty-one million, four hundred forty thousand, three hundred forty-three".