127221227 has 4 divisors (see below), whose sum is σ = 145395696. Its totient is φ = 109046760.

The previous prime is 127221209. The next prime is 127221229. The reversal of 127221227 is 722122721.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127221227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127221196 and 127221205.

It is not an unprimeable number, because it can be changed into a prime (127221229) 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, 9087224 + ... + 9087237.

It is an arithmetic number, because the mean of its divisors is an integer number (36348924).

Almost surely, 2^127221227 is an apocalyptic number.

127221227 is a deficient number, since it is larger than the sum of its proper divisors (18174469).

127221227 is an equidigital number, since it uses as much as digits as its factorization.

127221227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18174468.

The product of its digits is 1568, while the sum is 26.

The square root of 127221227 is about 11279.2387597745. The cubic root of 127221227 is about 502.9442645816.

Adding to 127221227 its reverse (722122721), we get a palindrome (849343948).

The spelling of 127221227 in words is "one hundred twenty-seven million, two hundred twenty-one thousand, two hundred twenty-seven".