127120121021720 has 16 divisors (see below), whose sum is σ = 286020272298960. Its totient is φ = 50848048408672.

The previous prime is 127120121021717. The next prime is 127120121021791. The reversal of 127120121021720 is 27120121021721.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1589001512732 + ... + 1589001512811.

It is an arithmetic number, because the mean of its divisors is an integer number (17876267018685).

Almost surely, 2^{127120121021720} is an apocalyptic number.

127120121021720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127120121021720 is an abundant number, since it is smaller than the sum of its proper divisors (158900151277240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127120121021720 is a wasteful number, since it uses less digits than its factorization.

127120121021720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3178003025554 (or 3178003025550 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 29.

Subtracting from 127120121021720 its reverse (27120121021721), we obtain a palindrome (99999999999999).

The spelling of 127120121021720 in words is "one hundred twenty-seven trillion, one hundred twenty billion, one hundred twenty-one million, twenty-one thousand, seven hundred twenty".