21727127117187 has 48 divisors (see below), whose sum is σ = 34888645153440. Its totient is φ = 12966156758016.

The previous prime is 21727127117159. The next prime is 21727127117209. The reversal of 21727127117187 is 78171172172712.

It is a happy number.

21727127117187 is a `hidden beast` number, since 2 + 17 + 271 + 271 + 17 + 1 + 87 = 666.

It is not a de Polignac number, because 21727127117187 - 2⁸ = 21727127116931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21727127110187) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36246048 + ... + 36840605.

It is an arithmetic number, because the mean of its divisors is an integer number (726846774030).

Almost surely, 2^{21727127117187} is an apocalyptic number.

21727127117187 is a deficient number, since it is larger than the sum of its proper divisors (13161518036253).

21727127117187 is a wasteful number, since it uses less digits than its factorization.

21727127117187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73086772 (or 73086769 counting only the distinct ones).

The product of its digits is 1075648, while the sum is 54.

Adding to 21727127117187 its reverse (78171172172712), we get a palindrome (99898299289899).

The spelling of 21727127117187 in words is "twenty-one trillion, seven hundred twenty-seven billion, one hundred twenty-seven million, one hundred seventeen thousand, one hundred eighty-seven".