21330311323303 has 2 divisors, whose sum is σ = 21330311323304. Its totient is φ = 21330311323302.

The previous prime is 21330311323259. The next prime is 21330311323333. The reversal of 21330311323303 is 30332311303312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21330311323303 - 2¹³ = 21330311315111 is a prime.

It is a super-2 number, since 2×21330311323303² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21330311323333) 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, 10665155661651 + 10665155661652.

It is an arithmetic number, because the mean of its divisors is an integer number (10665155661652).

Almost surely, 2^{21330311323303} is an apocalyptic number.

21330311323303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330311323303 is an equidigital number, since it uses as much as digits as its factorization.

21330311323303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 28.

Adding to 21330311323303 its reverse (30332311303312), we get a palindrome (51662622626615).

The spelling of 21330311323303 in words is "twenty-one trillion, three hundred thirty billion, three hundred eleven million, three hundred twenty-three thousand, three hundred three".