1269205841161 has 2 divisors, whose sum is σ = 1269205841162. Its totient is φ = 1269205841160.

The previous prime is 1269205841147. The next prime is 1269205841191. The reversal of 1269205841161 is 1611485029621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 892278606025 + 376927235136 = 944605^2 + 613944^2 .

It is a cyclic number.

It is not a de Polignac number, because 1269205841161 - 2³⁷ = 1131766887689 is a prime.

It is a super-2 number, since 2×1269205841161² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1269205841191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634602920580 + 634602920581.

It is an arithmetic number, because the mean of its divisors is an integer number (634602920581).

Almost surely, 2^{1269205841161} is an apocalyptic number.

It is an amenable number.

1269205841161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1269205841161 is an equidigital number, since it uses as much as digits as its factorization.

1269205841161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 1269205841161 in words is "one trillion, two hundred sixty-nine billion, two hundred five million, eight hundred forty-one thousand, one hundred sixty-one".