21231323323 has 8 divisors (see below), whose sum is σ = 24266926080. Its totient is φ = 18196359720.

The previous prime is 21231323317. The next prime is 21231323327. The reversal of 21231323323 is 32332313212.

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

It is a de Polignac number, because none of the positive numbers 2^k-21231323323 is a prime.

It is a super-3 number, since 3×21231323323³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21231323327) 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, 86353 + ... + 223426.

It is an arithmetic number, because the mean of its divisors is an integer number (3033365760).

Almost surely, 2^21231323323 is an apocalyptic number.

21231323323 is a deficient number, since it is larger than the sum of its proper divisors (3035602757).

21231323323 is an equidigital number, since it uses as much as digits as its factorization.

21231323323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319577.

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

Adding to 21231323323 its reverse (32332313212), we get a palindrome (53563636535).

The spelling of 21231323323 in words is "twenty-one billion, two hundred thirty-one million, three hundred twenty-three thousand, three hundred twenty-three".