21000200000323 has 2 divisors, whose sum is σ = 21000200000324. Its totient is φ = 21000200000322.

The previous prime is 21000200000231. The next prime is 21000200000357. The reversal of 21000200000323 is 32300000200012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21000200000323 - 2¹³ = 21000199992131 is a prime.

It is a super-2 number, since 2×21000200000323² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21000200000383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500100000161 + 10500100000162.

It is an arithmetic number, because the mean of its divisors is an integer number (10500100000162).

Almost surely, 2^{21000200000323} is an apocalyptic number.

21000200000323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000200000323 is an equidigital number, since it uses as much as digits as its factorization.

21000200000323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 21000200000323 its reverse (32300000200012), we get a palindrome (53300200200335).

The spelling of 21000200000323 in words is "twenty-one trillion, two hundred million, three hundred twenty-three", and thus it is an aban number.