11211535443161 has 2 divisors, whose sum is σ = 11211535443162. Its totient is φ = 11211535443160.

The previous prime is 11211535443151. The next prime is 11211535443271. The reversal of 11211535443161 is 16134453511211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10612739598400 + 598795844761 = 3257720^2 + 773819^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211535443161 - 2¹⁸ = 11211535181017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11211535443151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605767721580 + 5605767721581.

It is an arithmetic number, because the mean of its divisors is an integer number (5605767721581).

Almost surely, 2^{11211535443161} is an apocalyptic number.

It is an amenable number.

11211535443161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211535443161 is an equidigital number, since it uses as much as digits as its factorization.

11211535443161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 38.

Adding to 11211535443161 its reverse (16134453511211), we get a palindrome (27345988954372).

The spelling of 11211535443161 in words is "eleven trillion, two hundred eleven billion, five hundred thirty-five million, four hundred forty-three thousand, one hundred sixty-one".