271220389681 has 2 divisors, whose sum is σ = 271220389682. Its totient is φ = 271220389680.

The previous prime is 271220389529. The next prime is 271220389691. The reversal of 271220389681 is 186983022172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244118999056 + 27101390625 = 494084^2 + 164625^2 .

It is a cyclic number.

It is not a de Polignac number, because 271220389681 - 2⁹ = 271220389169 is a prime.

It is a super-2 number, since 2×271220389681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (271220389691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135610194840 + 135610194841.

It is an arithmetic number, because the mean of its divisors is an integer number (135610194841).

Almost surely, 2^271220389681 is an apocalyptic number.

It is an amenable number.

271220389681 is a deficient number, since it is larger than the sum of its proper divisors (1).

271220389681 is an equidigital number, since it uses as much as digits as its factorization.

271220389681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 271220389681 in words is "two hundred seventy-one billion, two hundred twenty million, three hundred eighty-nine thousand, six hundred eighty-one".