21100332323 has 24 divisors (see below), whose sum is σ = 26193894912. Its totient is φ = 16887999744.

The previous prime is 21100332317. The next prime is 21100332349. The reversal of 21100332323 is 32323300112.

It is not a de Polignac number, because 21100332323 - 2²⁰ = 21099283747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21100332295 and 21100332304.

It is not an unprimeable number, because it can be changed into a prime (21100332353) 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 23 ways as a sum of consecutive naturals, for example, 6065 + ... + 205517.

It is an arithmetic number, because the mean of its divisors is an integer number (1091412288).

Almost surely, 2^21100332323 is an apocalyptic number.

21100332323 is a deficient number, since it is larger than the sum of its proper divisors (5093562589).

21100332323 is a wasteful number, since it uses less digits than its factorization.

21100332323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199611 (or 199604 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21100332323 its reverse (32323300112), we get a palindrome (53423632435).

The spelling of 21100332323 in words is "twenty-one billion, one hundred million, three hundred thirty-two thousand, three hundred twenty-three".