21160340323105 has 16 divisors (see below), whose sum is σ = 25625333764800. Its totient is φ = 16773467209920.

The previous prime is 21160340323093. The next prime is 21160340323159. The reversal of 21160340323105 is 50132304306112.

It is a de Polignac number, because none of the positive numbers 2^k-21160340323105 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 29554431 + ... + 30261940.

It is an arithmetic number, because the mean of its divisors is an integer number (1601583360300).

Almost surely, 2^{21160340323105} is an apocalyptic number.

It is an amenable number.

21160340323105 is a deficient number, since it is larger than the sum of its proper divisors (4464993441695).

21160340323105 is a wasteful number, since it uses less digits than its factorization.

21160340323105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59817024.

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 21160340323105 its reverse (50132304306112), we get a palindrome (71292644629217).

The spelling of 21160340323105 in words is "twenty-one trillion, one hundred sixty billion, three hundred forty million, three hundred twenty-three thousand, one hundred five".