21124002323 has 2 divisors, whose sum is σ = 21124002324. Its totient is φ = 21124002322.

The previous prime is 21124002311. The next prime is 21124002359. The reversal of 21124002323 is 32320042112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21124002323 - 2¹⁰ = 21124001299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21124002295 and 21124002304.

It is not a weakly prime, because it can be changed into another prime (21124002923) 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, 10562001161 + 10562001162.

It is an arithmetic number, because the mean of its divisors is an integer number (10562001162).

Almost surely, 2^21124002323 is an apocalyptic number.

21124002323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21124002323 is an equidigital number, since it uses as much as digits as its factorization.

21124002323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21124002323 its reverse (32320042112), we get a palindrome (53444044435).

The spelling of 21124002323 in words is "twenty-one billion, one hundred twenty-four million, two thousand, three hundred twenty-three".