127220101 has 4 divisors (see below), whose sum is σ = 130178752. Its totient is φ = 124261452.

The previous prime is 127220081. The next prime is 127220123. The reversal of 127220101 is 101022721.

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: 101022721 = 17 ⋅5942513.

It is a cyclic number.

It is not a de Polignac number, because 127220101 - 2²⁵ = 93665669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127220161) 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, 1479261 + ... + 1479346.

It is an arithmetic number, because the mean of its divisors is an integer number (32544688).

Almost surely, 2^127220101 is an apocalyptic number.

It is an amenable number.

127220101 is a deficient number, since it is larger than the sum of its proper divisors (2958651).

127220101 is an equidigital number, since it uses as much as digits as its factorization.

127220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958650.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 127220101 is about 11279.1888449480. The cubic root of 127220101 is about 502.9427807702.

Adding to 127220101 its reverse (101022721), we get a palindrome (228242822).

The spelling of 127220101 in words is "one hundred twenty-seven million, two hundred twenty thousand, one hundred one".