127287272453221 has 8 divisors (see below), whose sum is σ = 127599602382360. Its totient is φ = 126974947959552.

The previous prime is 127287272453213. The next prime is 127287272453227. The reversal of 127287272453221 is 122354272782721.

It can be written as a sum of positive squares in 4 ways, for example, as 60661682450721 + 66625590002500 = 7788561^2 + 8162450^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127287272453221 - 2³ = 127287272453213 is a prime.

It is a super-2 number, since 2×127287272453221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127287272453227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47704761 + ... + 50302273.

It is an arithmetic number, because the mean of its divisors is an integer number (15949950297795).

Almost surely, 2^{127287272453221} is an apocalyptic number.

It is an amenable number.

127287272453221 is a deficient number, since it is larger than the sum of its proper divisors (312329929139).

127287272453221 is a wasteful number, since it uses less digits than its factorization.

127287272453221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717735.

The product of its digits is 10536960, while the sum is 55.

The spelling of 127287272453221 in words is "one hundred twenty-seven trillion, two hundred eighty-seven billion, two hundred seventy-two million, four hundred fifty-three thousand, two hundred twenty-one".