21303434107 has 2 divisors, whose sum is σ = 21303434108. Its totient is φ = 21303434106.

The previous prime is 21303434083. The next prime is 21303434137. The reversal of 21303434107 is 70143430312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21303434107 - 2²⁷ = 21169216379 is a prime.

It is not a weakly prime, because it can be changed into another prime (21303434137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651717053 + 10651717054.

It is an arithmetic number, because the mean of its divisors is an integer number (10651717054).

Almost surely, 2^21303434107 is an apocalyptic number.

21303434107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303434107 is an equidigital number, since it uses as much as digits as its factorization.

21303434107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 28.

Adding to 21303434107 its reverse (70143430312), we get a palindrome (91446864419).

The spelling of 21303434107 in words is "twenty-one billion, three hundred three million, four hundred thirty-four thousand, one hundred seven".