21003210233323 has 4 divisors (see below), whose sum is σ = 21031478350128. Its totient is φ = 20974942116520.

The previous prime is 21003210233321. The next prime is 21003210233333. The reversal of 21003210233323 is 32333201230012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21003210233323 - 2¹ = 21003210233321 is a prime.

It is a super-2 number, since 2×21003210233323² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21003210233321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14134057288 + ... + 14134058773.

It is an arithmetic number, because the mean of its divisors is an integer number (5257869587532).

Almost surely, 2^{21003210233323} is an apocalyptic number.

21003210233323 is a deficient number, since it is larger than the sum of its proper divisors (28268116805).

21003210233323 is an equidigital number, since it uses as much as digits as its factorization.

21003210233323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28268116804.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21003210233323 its reverse (32333201230012), we get a palindrome (53336411463335).

The spelling of 21003210233323 in words is "twenty-one trillion, three billion, two hundred ten million, two hundred thirty-three thousand, three hundred twenty-three".