1271734371721 has 8 divisors (see below), whose sum is σ = 1419610461984. Its totient is φ = 1129235593920.

The previous prime is 1271734371709. The next prime is 1271734371727.

1271734371721 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1271734371721 - 2¹⁷ = 1271734240649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1271734371727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344327616 + ... + 1344328561.

It is an arithmetic number, because the mean of its divisors is an integer number (177451307748).

Almost surely, 2^{1271734371721} is an apocalyptic number.

1271734371721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1271734371721 is a deficient number, since it is larger than the sum of its proper divisors (147876090263).

1271734371721 is a wasteful number, since it uses less digits than its factorization.

1271734371721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688656231.

The product of its digits is 345744, while the sum is 46.

The spelling of 1271734371721 in words is "one trillion, two hundred seventy-one billion, seven hundred thirty-four million, three hundred seventy-one thousand, seven hundred twenty-one".