127227042721 has 9 divisors (see below), whose sum is σ = 128511358929. Its totient is φ = 125955446436.

The previous prime is 127227042707. The next prime is 127227042737. The reversal of 127227042721 is 127240722721.

The square root of 127227042721 is 356689.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 127227042721 - 2³³ = 118637108129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127227043721) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 36737236 + ... + 36740698.

It is an arithmetic number, because the mean of its divisors is an integer number (14279039881).

Almost surely, 2^127227042721 is an apocalyptic number.

127227042721 is the 356689-th square number.

127227042721 is the 178345-th centered octagonal number.

It is an amenable number.

127227042721 is a deficient number, since it is larger than the sum of its proper divisors (1284316208).

127227042721 is an frugal number, since it uses more digits than its factorization.

127227042721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7132 (or 3566 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 37.

The spelling of 127227042721 in words is "one hundred twenty-seven billion, two hundred twenty-seven million, forty-two thousand, seven hundred twenty-one".