20121271127 has 2 divisors, whose sum is σ = 20121271128. Its totient is φ = 20121271126.

The previous prime is 20121271109. The next prime is 20121271129. The reversal of 20121271127 is 72117212102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20121271127 - 2⁶ = 20121271063 is a prime.

Together with 20121271129, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20121271096 and 20121271105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121271129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060635563 + 10060635564.

It is an arithmetic number, because the mean of its divisors is an integer number (10060635564).

Almost surely, 2^20121271127 is an apocalyptic number.

20121271127 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121271127 is an equidigital number, since it uses as much as digits as its factorization.

20121271127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 26.

Adding to 20121271127 its reverse (72117212102), we get a palindrome (92238483229).

The spelling of 20121271127 in words is "twenty billion, one hundred twenty-one million, two hundred seventy-one thousand, one hundred twenty-seven".