21000323012323 has 2 divisors, whose sum is σ = 21000323012324. Its totient is φ = 21000323012322.

The previous prime is 21000323012311. The next prime is 21000323012407. The reversal of 21000323012323 is 32321032300012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21000323012323 - 2³⁷ = 20862884058851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21000323012294 and 21000323012303.

It is not a weakly prime, because it can be changed into another prime (21000323012623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500161506161 + 10500161506162.

It is an arithmetic number, because the mean of its divisors is an integer number (10500161506162).

Almost surely, 2^{21000323012323} is an apocalyptic number.

21000323012323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000323012323 is an equidigital number, since it uses as much as digits as its factorization.

21000323012323 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 21000323012323 its reverse (32321032300012), we get a palindrome (53321355312335).

The spelling of 21000323012323 in words is "twenty-one trillion, three hundred twenty-three million, twelve thousand, three hundred twenty-three".