216207011 has 2 divisors, whose sum is σ = 216207012. Its totient is φ = 216207010.

The previous prime is 216206987. The next prime is 216207029. The reversal of 216207011 is 110702612.

216207011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216207011 is a prime.

It is not a weakly prime, because it can be changed into another prime (216207031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108103505 + 108103506.

It is an arithmetic number, because the mean of its divisors is an integer number (108103506).

Almost surely, 2^216207011 is an apocalyptic number.

216207011 is a deficient number, since it is larger than the sum of its proper divisors (1).

216207011 is an equidigital number, since it uses as much as digits as its factorization.

216207011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 216207011 is about 14703.9794273523. The cubic root of 216207011 is about 600.1916156511.

Adding to 216207011 its reverse (110702612), we get a palindrome (326909623).

The spelling of 216207011 in words is "two hundred sixteen million, two hundred seven thousand, eleven".