21233021323 has 2 divisors, whose sum is σ = 21233021324. Its totient is φ = 21233021322.

The previous prime is 21233021287. The next prime is 21233021387. The reversal of 21233021323 is 32312033212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21233021323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21233021294 and 21233021303.

It is not a weakly prime, because it can be changed into another prime (21233021393) 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 as a sum of consecutive naturals, namely, 10616510661 + 10616510662.

It is an arithmetic number, because the mean of its divisors is an integer number (10616510662).

Almost surely, 2^21233021323 is an apocalyptic number.

21233021323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233021323 is an equidigital number, since it uses as much as digits as its factorization.

21233021323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21233021323 its reverse (32312033212), we get a palindrome (53545054535).

The spelling of 21233021323 in words is "twenty-one billion, two hundred thirty-three million, twenty-one thousand, three hundred twenty-three".