1071216161 has 2 divisors, whose sum is σ = 1071216162. Its totient is φ = 1071216160.

The previous prime is 1071216109. The next prime is 1071216163. The reversal of 1071216161 is 1616121701.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1068047761 + 3168400 = 32681^2 + 1780^2 .

It is an emirp because it is prime and its reverse (1616121701) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1071216161 is a prime.

It is a super-2 number, since 2×1071216161² = 2295008127175155842, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1071216163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1071216161.

It is not a weakly prime, because it can be changed into another prime (1071216163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535608080 + 535608081.

It is an arithmetic number, because the mean of its divisors is an integer number (535608081).

Almost surely, 2^1071216161 is an apocalyptic number.

It is an amenable number.

1071216161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1071216161 is an equidigital number, since it uses as much as digits as its factorization.

1071216161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 1071216161 is about 32729.4387516804. The cubic root of 1071216161 is about 1023.1964830125.

Adding to 1071216161 its reverse (1616121701), we get a palindrome (2687337862).

The spelling of 1071216161 in words is "one billion, seventy-one million, two hundred sixteen thousand, one hundred sixty-one".