21168130911 has 8 divisors (see below), whose sum is σ = 28224919344. Its totient is φ = 14111714880.

The previous prime is 21168130909. The next prime is 21168130931. The reversal of 21168130911 is 11903186112.

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

It is not a de Polignac number, because 21168130911 - 2¹ = 21168130909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21168130901) 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, 92251 + ... + 225491.

It is an arithmetic number, because the mean of its divisors is an integer number (3528114918).

Almost surely, 2^21168130911 is an apocalyptic number.

21168130911 is a deficient number, since it is larger than the sum of its proper divisors (7056788433).

21168130911 is a wasteful number, since it uses less digits than its factorization.

21168130911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186201.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 21168130911 in words is "twenty-one billion, one hundred sixty-eight million, one hundred thirty thousand, nine hundred eleven".