21101101165005 has 8 divisors (see below), whose sum is σ = 33761761864032. Its totient is φ = 11253920621328.

The previous prime is 21101101165003. The next prime is 21101101165031. The reversal of 21101101165005 is 50056110110112.

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

It is not a de Polignac number, because 21101101165005 - 2¹ = 21101101165003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101101165003) 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, 703370038819 + ... + 703370038848.

It is an arithmetic number, because the mean of its divisors is an integer number (4220220233004).

Almost surely, 2^{21101101165005} is an apocalyptic number.

It is an amenable number.

21101101165005 is a deficient number, since it is larger than the sum of its proper divisors (12660660699027).

21101101165005 is a wasteful number, since it uses less digits than its factorization.

21101101165005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406740077675.

The product of its (nonzero) digits is 300, while the sum is 24.

Adding to 21101101165005 its reverse (50056110110112), we get a palindrome (71157211275117).

The spelling of 21101101165005 in words is "twenty-one trillion, one hundred one billion, one hundred one million, one hundred sixty-five thousand, five".