271742240821 has 2 divisors, whose sum is σ = 271742240822. Its totient is φ = 271742240820.

The previous prime is 271742240779. The next prime is 271742240827. The reversal of 271742240821 is 128042247172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 269943632721 + 1798608100 = 519561^2 + 42410^2 .

It is a cyclic number.

It is not a de Polignac number, because 271742240821 - 2⁹ = 271742240309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (271742240827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135871120410 + 135871120411.

It is an arithmetic number, because the mean of its divisors is an integer number (135871120411).

Almost surely, 2^271742240821 is an apocalyptic number.

It is an amenable number.

271742240821 is a deficient number, since it is larger than the sum of its proper divisors (1).

271742240821 is an equidigital number, since it uses as much as digits as its factorization.

271742240821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100352, while the sum is 40.

Adding to 271742240821 its reverse (128042247172), we get a palindrome (399784487993).

The spelling of 271742240821 in words is "two hundred seventy-one billion, seven hundred forty-two million, two hundred forty thousand, eight hundred twenty-one".