16720101011 has 2 divisors, whose sum is σ = 16720101012. Its totient is φ = 16720101010.

The previous prime is 16720100993. The next prime is 16720101017. The reversal of 16720101011 is 11010102761.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16720101011 is a prime.

It is not a weakly prime, because it can be changed into another prime (16720101017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8360050505 + 8360050506.

It is an arithmetic number, because the mean of its divisors is an integer number (8360050506).

Almost surely, 2^16720101011 is an apocalyptic number.

16720101011 is a deficient number, since it is larger than the sum of its proper divisors (1).

16720101011 is an equidigital number, since it uses as much as digits as its factorization.

16720101011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 20.

Adding to 16720101011 its reverse (11010102761), we get a palindrome (27730203772).

It can be divided in two parts, 16 and 720101011, that added together give a palindrome (720101027).

The spelling of 16720101011 in words is "sixteen billion, seven hundred twenty million, one hundred one thousand, eleven".