21727127110187 has 2 divisors, whose sum is σ = 21727127110188. Its totient is φ = 21727127110186.

The previous prime is 21727127110177. The next prime is 21727127110211. The reversal of 21727127110187 is 78101172172712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21727127110187 - 2²⁰ = 21727126061611 is a prime.

It is not a weakly prime, because it can be changed into another prime (21727127110177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10863563555093 + 10863563555094.

It is an arithmetic number, because the mean of its divisors is an integer number (10863563555094).

Almost surely, 2^{21727127110187} is an apocalyptic number.

21727127110187 is a deficient number, since it is larger than the sum of its proper divisors (1).

21727127110187 is an equidigital number, since it uses as much as digits as its factorization.

21727127110187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153664, while the sum is 47.

Adding to 21727127110187 its reverse (78101172172712), we get a palindrome (99828299282899).

The spelling of 21727127110187 in words is "twenty-one trillion, seven hundred twenty-seven billion, one hundred twenty-seven million, one hundred ten thousand, one hundred eighty-seven".