21123340100323 has 8 divisors (see below), whose sum is σ = 21267202537728. Its totient is φ = 20979684512904.

The previous prime is 21123340100171. The next prime is 21123340100333. The reversal of 21123340100323 is 32300104332112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21123340100323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21123340100333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51507561 + ... + 51916042.

It is an arithmetic number, because the mean of its divisors is an integer number (2658400317216).

Almost surely, 2^{21123340100323} is an apocalyptic number.

21123340100323 is a deficient number, since it is larger than the sum of its proper divisors (143862437405).

21123340100323 is a wasteful number, since it uses less digits than its factorization.

21123340100323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103424993.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21123340100323 its reverse (32300104332112), we get a palindrome (53423444432435).

The spelling of 21123340100323 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred forty million, one hundred thousand, three hundred twenty-three".