23121521303 has 4 divisors (see below), whose sum is σ = 23359887600. Its totient is φ = 22883155008.

The previous prime is 23121521281. The next prime is 23121521309. The reversal of 23121521303 is 30312512132.

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

It is a cyclic number.

It is not a de Polignac number, because 23121521303 - 2⁶ = 23121521239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121521309) 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, 119183003 + ... + 119183196.

It is an arithmetic number, because the mean of its divisors is an integer number (5839971900).

Almost surely, 2^23121521303 is an apocalyptic number.

23121521303 is a deficient number, since it is larger than the sum of its proper divisors (238366297).

23121521303 is an equidigital number, since it uses as much as digits as its factorization.

23121521303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238366296.

The product of its (nonzero) digits is 1080, while the sum is 23.

The spelling of 23121521303 in words is "twenty-three billion, one hundred twenty-one million, five hundred twenty-one thousand, three hundred three".