127730005542921 has 4 divisors (see below), whose sum is σ = 170306674057232. Its totient is φ = 85153337028612.

The previous prime is 127730005542913. The next prime is 127730005542989. The reversal of 127730005542921 is 129245500037721.

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.

It is not a de Polignac number, because 127730005542921 - 2³ = 127730005542913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (127730005562921) 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, 21288334257151 + ... + 21288334257156.

It is an arithmetic number, because the mean of its divisors is an integer number (42576668514308).

Almost surely, 2^{127730005542921} is an apocalyptic number.

It is an amenable number.

127730005542921 is a deficient number, since it is larger than the sum of its proper divisors (42576668514311).

127730005542921 is an equidigital number, since it uses as much as digits as its factorization.

127730005542921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42576668514310.

The product of its (nonzero) digits is 1058400, while the sum is 48.

The spelling of 127730005542921 in words is "one hundred twenty-seven trillion, seven hundred thirty billion, five million, five hundred forty-two thousand, nine hundred twenty-one".