21134113305 has 16 divisors (see below), whose sum is σ = 33847403904. Its totient is φ = 11260586240.

The previous prime is 21134113303. The next prime is 21134113327. The reversal of 21134113305 is 50331143112.

It is not a de Polignac number, because 21134113305 - 2¹ = 21134113303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21134113303) by changing a digit.

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, 667824 + ... + 698753.

It is an arithmetic number, because the mean of its divisors is an integer number (2115462744).

Almost surely, 2^21134113305 is an apocalyptic number.

It is an amenable number.

21134113305 is a deficient number, since it is larger than the sum of its proper divisors (12713290599).

21134113305 is a wasteful number, since it uses less digits than its factorization.

21134113305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367616.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 21134113305 its reverse (50331143112), we get a palindrome (71465256417).

The spelling of 21134113305 in words is "twenty-one billion, one hundred thirty-four million, one hundred thirteen thousand, three hundred five".