2117841508427 has 2 divisors, whose sum is σ = 2117841508428. Its totient is φ = 2117841508426.

The previous prime is 2117841508421. The next prime is 2117841508441. The reversal of 2117841508427 is 7248051487112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2117841508427 - 2⁴ = 2117841508411 is a prime.

It is not a weakly prime, because it can be changed into another prime (2117841508421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058920754213 + 1058920754214.

It is an arithmetic number, because the mean of its divisors is an integer number (1058920754214).

Almost surely, 2^{2117841508427} is an apocalyptic number.

2117841508427 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117841508427 is an equidigital number, since it uses as much as digits as its factorization.

2117841508427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1003520, while the sum is 50.

The spelling of 2117841508427 in words is "two trillion, one hundred seventeen billion, eight hundred forty-one million, five hundred eight thousand, four hundred twenty-seven".