127009121 has 4 divisors (see below), whose sum is σ = 127032000. Its totient is φ = 126986244.

The previous prime is 127009117. The next prime is 127009133. The reversal of 127009121 is 121900721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 127009121 - 2² = 127009117 is a prime.

It is a super-2 number, since 2×127009121² = 32262633634385282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127009171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780 + ... + 16178.

It is an arithmetic number, because the mean of its divisors is an integer number (31758000).

Almost surely, 2^127009121 is an apocalyptic number.

It is an amenable number.

127009121 is a deficient number, since it is larger than the sum of its proper divisors (22879).

127009121 is an equidigital number, since it uses as much as digits as its factorization.

127009121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22878.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 127009121 is about 11269.8323412551. The cubic root of 127009121 is about 502.6646025611.

Adding to 127009121 its reverse (121900721), we get a palindrome (248909842).

The spelling of 127009121 in words is "one hundred twenty-seven million, nine thousand, one hundred twenty-one".