21231143323 has 6 divisors (see below), whose sum is σ = 22989936444. Its totient is φ = 19597978296.

The previous prime is 21231143287. The next prime is 21231143327. The reversal of 21231143323 is 32334113212.

It is not a de Polignac number, because 21231143323 - 2³³ = 12641208731 is a prime.

It is a super-2 number, since 2×21231143323² (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 (21231143327) 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 5 ways as a sum of consecutive naturals, for example, 62813865 + ... + 62814202.

It is an arithmetic number, because the mean of its divisors is an integer number (3831656074).

Almost surely, 2^21231143323 is an apocalyptic number.

21231143323 is a deficient number, since it is larger than the sum of its proper divisors (1758793121).

21231143323 is a wasteful number, since it uses less digits than its factorization.

21231143323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125628093 (or 125628080 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

Adding to 21231143323 its reverse (32334113212), we get a palindrome (53565256535).

The spelling of 21231143323 in words is "twenty-one billion, two hundred thirty-one million, one hundred forty-three thousand, three hundred twenty-three".