1271921356288 has 40 divisors (see below), whose sum is σ = 2772391093560. Its totient is φ = 578146068480.

The previous prime is 1271921356273. The next prime is 1271921356331. The reversal of 1271921356288 is 8826531291721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112913523 + ... + 112924786.

It is an arithmetic number, because the mean of its divisors is an integer number (69309777339).

Almost surely, 2^{1271921356288} is an apocalyptic number.

It is an amenable number.

1271921356288 is an abundant number, since it is smaller than the sum of its proper divisors (1500469737272).

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

1271921356288 is an equidigital number, since it uses as much as digits as its factorization.

1271921356288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225838338 (or 225838322 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 55.

The spelling of 1271921356288 in words is "one trillion, two hundred seventy-one billion, nine hundred twenty-one million, three hundred fifty-six thousand, two hundred eighty-eight".