21234422323 has 2 divisors, whose sum is σ = 21234422324. Its totient is φ = 21234422322.

The previous prime is 21234422291. The next prime is 21234422351. The reversal of 21234422323 is 32322443212.

It is an a-pointer prime, because the next prime (21234422351) can be obtained adding 21234422323 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21234422323 - 2⁵ = 21234422291 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21234422291 and 21234422300.

It is not a weakly prime, because it can be changed into another prime (21234422393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617211161 + 10617211162.

It is an arithmetic number, because the mean of its divisors is an integer number (10617211162).

Almost surely, 2^21234422323 is an apocalyptic number.

21234422323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21234422323 is an equidigital number, since it uses as much as digits as its factorization.

21234422323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 28.

Adding to 21234422323 its reverse (32322443212), we get a palindrome (53556865535).

The spelling of 21234422323 in words is "twenty-one billion, two hundred thirty-four million, four hundred twenty-two thousand, three hundred twenty-three".