21133212323 has 8 divisors (see below), whose sum is σ = 21652668576. Its totient is φ = 20613947200.

The previous prime is 21133212313. The next prime is 21133212349. The reversal of 21133212323 is 32321233112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21133212323 - 2¹² = 21133208227 is a prime.

It is a super-2 number, since 2×21133212323² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21133212313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190490 + ... + 280272.

It is an arithmetic number, because the mean of its divisors is an integer number (2706583572).

Almost surely, 2^21133212323 is an apocalyptic number.

21133212323 is a deficient number, since it is larger than the sum of its proper divisors (519456253).

21133212323 is an equidigital number, since it uses as much as digits as its factorization.

21133212323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95565.

The product of its digits is 1296, while the sum is 23.

Adding to 21133212323 its reverse (32321233112), we get a palindrome (53454445435).

The spelling of 21133212323 in words is "twenty-one billion, one hundred thirty-three million, two hundred twelve thousand, three hundred twenty-three".