1161012402161 has 2 divisors, whose sum is σ = 1161012402162. Its totient is φ = 1161012402160.

The previous prime is 1161012402071. The next prime is 1161012402167. The reversal of 1161012402161 is 1612042101611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 904134739600 + 256877662561 = 950860^2 + 506831^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161012402161 - 2¹⁰ = 1161012401137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1161012402161.

It is not a weakly prime, because it can be changed into another prime (1161012402167) 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, 580506201080 + 580506201081.

It is an arithmetic number, because the mean of its divisors is an integer number (580506201081).

Almost surely, 2^{1161012402161} is an apocalyptic number.

It is an amenable number.

1161012402161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161012402161 is an equidigital number, since it uses as much as digits as its factorization.

1161012402161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

Adding to 1161012402161 its reverse (1612042101611), we get a palindrome (2773054503772).

The spelling of 1161012402161 in words is "one trillion, one hundred sixty-one billion, twelve million, four hundred two thousand, one hundred sixty-one".