21223231323 has 16 divisors (see below), whose sum is σ = 32343837696. Its totient is φ = 12126182400.

The previous prime is 21223231319. The next prime is 21223231357. The reversal of 21223231323 is 32313232212.

It is not a de Polignac number, because 21223231323 - 2² = 21223231319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21223231293 and 21223231302.

It is not an unprimeable number, because it can be changed into a prime (21223231373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148990 + ... + 254252.

It is an arithmetic number, because the mean of its divisors is an integer number (2021489856).

Almost surely, 2^21223231323 is an apocalyptic number.

21223231323 is a deficient number, since it is larger than the sum of its proper divisors (11120606373).

21223231323 is a wasteful number, since it uses less digits than its factorization.

21223231323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114874.

The product of its digits is 2592, while the sum is 24.

Adding to 21223231323 its reverse (32313232212), we get a palindrome (53536463535).

The spelling of 21223231323 in words is "twenty-one billion, two hundred twenty-three million, two hundred thirty-one thousand, three hundred twenty-three".