11671112161 has 2 divisors, whose sum is σ = 11671112162. Its totient is φ = 11671112160.

The previous prime is 11671112149. The next prime is 11671112179. The reversal of 11671112161 is 16121117611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11646510561 + 24601600 = 107919^2 + 4960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11671112161 is a prime.

It is not a weakly prime, because it can be changed into another prime (11671112461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5835556080 + 5835556081.

It is an arithmetic number, because the mean of its divisors is an integer number (5835556081).

Almost surely, 2^11671112161 is an apocalyptic number.

It is an amenable number.

11671112161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11671112161 is an equidigital number, since it uses as much as digits as its factorization.

11671112161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 28.

Adding to 11671112161 its reverse (16121117611), we get a palindrome (27792229772).

The spelling of 11671112161 in words is "eleven billion, six hundred seventy-one million, one hundred twelve thousand, one hundred sixty-one".