127121727607 has 4 divisors (see below), whose sum is σ = 145281974416. Its totient is φ = 108961480800.

The previous prime is 127121727569. The next prime is 127121727637. The reversal of 127121727607 is 706727121721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 706727121721 = 29 ⋅24369900749.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127121727607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127121727637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9080123394 + ... + 9080123407.

It is an arithmetic number, because the mean of its divisors is an integer number (36320493604).

Almost surely, 2^127121727607 is an apocalyptic number.

127121727607 is a deficient number, since it is larger than the sum of its proper divisors (18160246809).

127121727607 is an equidigital number, since it uses as much as digits as its factorization.

127121727607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18160246808.

The product of its (nonzero) digits is 115248, while the sum is 43.

The spelling of 127121727607 in words is "one hundred twenty-seven billion, one hundred twenty-one million, seven hundred twenty-seven thousand, six hundred seven".