21303223307 has 2 divisors, whose sum is σ = 21303223308. Its totient is φ = 21303223306.

The previous prime is 21303223283. The next prime is 21303223327. The reversal of 21303223307 is 70332230312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21303223307 is a prime.

It is not a weakly prime, because it can be changed into another prime (21303223327) 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, 10651611653 + 10651611654.

It is an arithmetic number, because the mean of its divisors is an integer number (10651611654).

Almost surely, 2^21303223307 is an apocalyptic number.

21303223307 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303223307 is an equidigital number, since it uses as much as digits as its factorization.

21303223307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 26.

Adding to 21303223307 its reverse (70332230312), we get a palindrome (91635453619).

The spelling of 21303223307 in words is "twenty-one billion, three hundred three million, two hundred twenty-three thousand, three hundred seven".