21010333323 has 32 divisors (see below), whose sum is σ = 33710538240. Its totient is φ = 11370723840.

The previous prime is 21010333321. The next prime is 21010333349. The reversal of 21010333323 is 32333301012.

It is not a de Polignac number, because 21010333323 - 2¹ = 21010333321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 21010333323.

It is not an unprimeable number, because it can be changed into a prime (21010333321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2108533 + ... + 2118473.

It is an arithmetic number, because the mean of its divisors is an integer number (1053454320).

Almost surely, 2^21010333323 is an apocalyptic number.

21010333323 is a deficient number, since it is larger than the sum of its proper divisors (12700204917).

21010333323 is a wasteful number, since it uses less digits than its factorization.

21010333323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15267.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21010333323 its reverse (32333301012), we get a palindrome (53343634335).

The spelling of 21010333323 in words is "twenty-one billion, ten million, three hundred thirty-three thousand, three hundred twenty-three".