216111168011 has 2 divisors, whose sum is σ = 216111168012. Its totient is φ = 216111168010.

The previous prime is 216111167959. The next prime is 216111168037. The reversal of 216111168011 is 110861111612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216111168011 - 2¹⁸ = 216110905867 is a prime.

It is a super-2 number, since 2×216111168011² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (216111168211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108055584005 + 108055584006.

It is an arithmetic number, because the mean of its divisors is an integer number (108055584006).

Almost surely, 2^216111168011 is an apocalyptic number.

216111168011 is a deficient number, since it is larger than the sum of its proper divisors (1).

216111168011 is an equidigital number, since it uses as much as digits as its factorization.

216111168011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 29.

Adding to 216111168011 its reverse (110861111612), we get a palindrome (326972279623).

The spelling of 216111168011 in words is "two hundred sixteen billion, one hundred eleven million, one hundred sixty-eight thousand, eleven".