127443344721 has 64 divisors (see below), whose sum is σ = 223165286400. Its totient is φ = 62674560000.

The previous prime is 127443344713. The next prime is 127443344731.

It is a happy number.

127443344721 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 127443344721 - 2³ = 127443344713 is a prime.

It is a super-2 number, since 2×127443344721² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127443344711) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6525471 + ... + 6544971.

It is an arithmetic number, because the mean of its divisors is an integer number (3486957600).

Almost surely, 2^127443344721 is an apocalyptic number.

127443344721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

127443344721 is a deficient number, since it is larger than the sum of its proper divisors (95721941679).

127443344721 is a wasteful number, since it uses less digits than its factorization.

127443344721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21030.

The product of its digits is 451584, while the sum is 42.

The spelling of 127443344721 in words is "one hundred twenty-seven billion, four hundred forty-three million, three hundred forty-four thousand, seven hundred twenty-one".