21331110323 has 16 divisors (see below), whose sum is σ = 23280368640. Its totient is φ = 19470261600.

The previous prime is 21331110263. The next prime is 21331110331. The reversal of 21331110323 is 32301113312.

It is a cyclic number.

It is not a de Polignac number, because 21331110323 - 2¹⁴ = 21331093939 is a prime.

It is a super-2 number, since 2×21331110323² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21331110295 and 21331110304.

It is not an unprimeable number, because it can be changed into a prime (21331110023) 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 15 ways as a sum of consecutive naturals, for example, 53933 + ... + 213473.

It is an arithmetic number, because the mean of its divisors is an integer number (1455023040).

Almost surely, 2^21331110323 is an apocalyptic number.

21331110323 is a deficient number, since it is larger than the sum of its proper divisors (1949258317).

21331110323 is a wasteful number, since it uses less digits than its factorization.

21331110323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159818.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21331110323 its reverse (32301113312), we get a palindrome (53632223635).

The spelling of 21331110323 in words is "twenty-one billion, three hundred thirty-one million, one hundred ten thousand, three hundred twenty-three".