8112121161481 has 2 divisors, whose sum is σ = 8112121161482. Its totient is φ = 8112121161480.

The previous prime is 8112121161451. The next prime is 8112121161497. The reversal of 8112121161481 is 1841611212118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7603061743225 + 509059418256 = 2757365^2 + 713484^2 .

It is a cyclic number.

It is not a de Polignac number, because 8112121161481 - 2¹¹ = 8112121159433 is a prime.

It is a super-2 number, since 2×8112121161481² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8112121161481.

It is not a weakly prime, because it can be changed into another prime (8112121161451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4056060580740 + 4056060580741.

It is an arithmetic number, because the mean of its divisors is an integer number (4056060580741).

Almost surely, 2^{8112121161481} is an apocalyptic number.

It is an amenable number.

8112121161481 is a deficient number, since it is larger than the sum of its proper divisors (1).

8112121161481 is an equidigital number, since it uses as much as digits as its factorization.

8112121161481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 37.

Adding to 8112121161481 its reverse (1841611212118), we get a palindrome (9953732373599).

The spelling of 8112121161481 in words is "eight trillion, one hundred twelve billion, one hundred twenty-one million, one hundred sixty-one thousand, four hundred eighty-one".