21161144164105 has 8 divisors (see below), whose sum is σ = 27701861451264. Its totient is φ = 15389923028400.

The previous prime is 21161144164103. The next prime is 21161144164117. The reversal of 21161144164105 is 50146144116112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21161144164105 - 2¹ = 21161144164103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21161144164103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192374037801 + ... + 192374037910.

It is an arithmetic number, because the mean of its divisors is an integer number (3462732681408).

Almost surely, 2^{21161144164105} is an apocalyptic number.

It is an amenable number.

21161144164105 is a deficient number, since it is larger than the sum of its proper divisors (6540717287159).

21161144164105 is a wasteful number, since it uses less digits than its factorization.

21161144164105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384748075727.

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 21161144164105 in words is "twenty-one trillion, one hundred sixty-one billion, one hundred forty-four million, one hundred sixty-four thousand, one hundred five".