21342134105 has 16 divisors (see below), whose sum is σ = 26116083264. Its totient is φ = 16739110080.

The previous prime is 21342134089. The next prime is 21342134117. The reversal of 21342134105 is 50143124312.

It is a happy number.

It is not a de Polignac number, because 21342134105 - 2⁴ = 21342134089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80282 + ... + 221651.

It is an arithmetic number, because the mean of its divisors is an integer number (1632255204).

Almost surely, 2^21342134105 is an apocalyptic number.

It is an amenable number.

21342134105 is a deficient number, since it is larger than the sum of its proper divisors (4773949159).

21342134105 is a wasteful number, since it uses less digits than its factorization.

21342134105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302216.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 21342134105 its reverse (50143124312), we get a palindrome (71485258417).

The spelling of 21342134105 in words is "twenty-one billion, three hundred forty-two million, one hundred thirty-four thousand, one hundred five".