127012438181 has 8 divisors (see below), whose sum is σ = 134497611864. Its totient is φ = 119528803840.

The previous prime is 127012438123. The next prime is 127012438199. The reversal of 127012438181 is 181834210721.

It can be written as a sum of positive squares in 4 ways, for example, as 52136872225 + 74875565956 = 228335^2 + 273634^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 127012438181 - 2¹⁸ = 127012176037 is a prime.

It is a super-2 number, since 2×127012438181² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127012468181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212750 + ... + 547071.

It is an arithmetic number, because the mean of its divisors is an integer number (16812201483).

Almost surely, 2^127012438181 is an apocalyptic number.

It is an amenable number.

127012438181 is a deficient number, since it is larger than the sum of its proper divisors (7485173683).

127012438181 is an equidigital number, since it uses as much as digits as its factorization.

127012438181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769671.

The product of its (nonzero) digits is 21504, while the sum is 38.

The spelling of 127012438181 in words is "one hundred twenty-seven billion, twelve million, four hundred thirty-eight thousand, one hundred eighty-one".