21101300323 has 16 divisors (see below), whose sum is σ = 21623155200. Its totient is φ = 20586303360.

The previous prime is 21101300321. The next prime is 21101300333. The reversal of 21101300323 is 32300310112.

It is a cyclic number.

It is not a de Polignac number, because 21101300323 - 2¹ = 21101300321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21101300297 and 21101300306.

It is not an unprimeable number, because it can be changed into a prime (21101300321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5927218 + ... + 5930776.

It is an arithmetic number, because the mean of its divisors is an integer number (1351447200).

Almost surely, 2^21101300323 is an apocalyptic number.

21101300323 is a deficient number, since it is larger than the sum of its proper divisors (521854877).

21101300323 is a wasteful number, since it uses less digits than its factorization.

21101300323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4482.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21101300323 its reverse (32300310112), we get a palindrome (53401610435).

The spelling of 21101300323 in words is "twenty-one billion, one hundred one million, three hundred thousand, three hundred twenty-three".