2127775158121 has 2 divisors, whose sum is σ = 2127775158122. Its totient is φ = 2127775158120.

The previous prime is 2127775158101. The next prime is 2127775158139. The reversal of 2127775158121 is 1218515777212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1177659040000 + 950116118121 = 1085200^2 + 974739^2 .

It is a cyclic number.

It is not a de Polignac number, because 2127775158121 - 2³¹ = 2125627674473 is a prime.

It is not a weakly prime, because it can be changed into another prime (2127775158101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063887579060 + 1063887579061.

It is an arithmetic number, because the mean of its divisors is an integer number (1063887579061).

Almost surely, 2^{2127775158121} is an apocalyptic number.

It is an amenable number.

2127775158121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2127775158121 is an equidigital number, since it uses as much as digits as its factorization.

2127775158121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 548800, while the sum is 49.

The spelling of 2127775158121 in words is "two trillion, one hundred twenty-seven billion, seven hundred seventy-five million, one hundred fifty-eight thousand, one hundred twenty-one".