127148221 has 4 divisors (see below), whose sum is σ = 127597792. Its totient is φ = 126698652.

The previous prime is 127148213. The next prime is 127148233. The reversal of 127148221 is 122841721.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122841721 = 1301 ⋅94421.

It is a cyclic number.

It is not a de Polignac number, because 127148221 - 2³ = 127148213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127148221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127148201) 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 3 ways as a sum of consecutive naturals, for example, 224361 + ... + 224926.

It is an arithmetic number, because the mean of its divisors is an integer number (31899448).

Almost surely, 2^127148221 is an apocalyptic number.

It is an amenable number.

127148221 is a deficient number, since it is larger than the sum of its proper divisors (449571).

127148221 is an equidigital number, since it uses as much as digits as its factorization.

127148221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449570.

The product of its digits is 1792, while the sum is 28.

The square root of 127148221 is about 11276.0019953883. The cubic root of 127148221 is about 502.8480411876.

Adding to 127148221 its reverse (122841721), we get a palindrome (249989942).

The spelling of 127148221 in words is "one hundred twenty-seven million, one hundred forty-eight thousand, two hundred twenty-one".