127221117 has 16 divisors (see below), whose sum is σ = 176294400. Its totient is φ = 81518400.

The previous prime is 127221109. The next prime is 127221121. The reversal of 127221117 is 711122721.

It is not a de Polignac number, because 127221117 - 2³ = 127221109 is a prime.

It is a super-2 number, since 2×127221117² = 32370425221455378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127221167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9267 + ... + 18447.

It is an arithmetic number, because the mean of its divisors is an integer number (11018400).

Almost surely, 2^127221117 is an apocalyptic number.

It is an amenable number.

127221117 is a deficient number, since it is larger than the sum of its proper divisors (49073283).

127221117 is a wasteful number, since it uses less digits than its factorization.

127221117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9364.

The product of its digits is 392, while the sum is 24.

The square root of 127221117 is about 11279.2338835579. The cubic root of 127221117 is about 502.9441196270.

Adding to 127221117 its reverse (711122721), we get a palindrome (838343838).

The spelling of 127221117 in words is "one hundred twenty-seven million, two hundred twenty-one thousand, one hundred seventeen".