4127268221 has 4 divisors (see below), whose sum is σ = 4128129852. Its totient is φ = 4126406592.

The previous prime is 4127268181. The next prime is 4127268253. The reversal of 4127268221 is 1228627214.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1228627214 = 2 ⋅614313607.

It can be written as a sum of positive squares in 2 ways, for example, as 281904100 + 3845364121 = 16790^2 + 62011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4127268221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4127268121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423590 + ... + 433223.

It is an arithmetic number, because the mean of its divisors is an integer number (1032032463).

Almost surely, 2^4127268221 is an apocalyptic number.

It is an amenable number.

4127268221 is a deficient number, since it is larger than the sum of its proper divisors (861631).

4127268221 is an equidigital number, since it uses as much as digits as its factorization.

4127268221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861630.

The product of its digits is 21504, while the sum is 35.

The square root of 4127268221 is about 64243.8185431097. The cubic root of 4127268221 is about 1604.0610665584.

The spelling of 4127268221 in words is "four billion, one hundred twenty-seven million, two hundred sixty-eight thousand, two hundred twenty-one".