127406434121 has 4 divisors (see below), whose sum is σ = 128719902612. Its totient is φ = 126092965632.

The previous prime is 127406434079. The next prime is 127406434151. The reversal of 127406434121 is 121434604721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 85243561225 + 42162872896 = 291965^2 + 205336^2 .

It is a cyclic number.

It is not a de Polignac number, because 127406434121 - 2¹⁰ = 127406433097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127406434151) 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, 656734100 + ... + 656734293.

It is an arithmetic number, because the mean of its divisors is an integer number (32179975653).

Almost surely, 2^127406434121 is an apocalyptic number.

It is an amenable number.

127406434121 is a deficient number, since it is larger than the sum of its proper divisors (1313468491).

127406434121 is an equidigital number, since it uses as much as digits as its factorization.

127406434121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313468490.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 127406434121 in words is "one hundred twenty-seven billion, four hundred six million, four hundred thirty-four thousand, one hundred twenty-one".