16011001001 has 2 divisors, whose sum is σ = 16011001002. Its totient is φ = 16011001000.

The previous prime is 16011000991. The next prime is 16011001003. The reversal of 16011001001 is 10010011061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13417747225 + 2593253776 = 115835^2 + 50924^2 .

It is an emirp because it is prime and its reverse (10010011061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16011001001 - 2³⁰ = 14937259177 is a prime.

Together with 16011001003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16011001003) 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, 8005500500 + 8005500501.

It is an arithmetic number, because the mean of its divisors is an integer number (8005500501).

Almost surely, 2^16011001001 is an apocalyptic number.

It is an amenable number.

16011001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

16011001001 is an equidigital number, since it uses as much as digits as its factorization.

16011001001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 16011001001 its reverse (10010011061), we get a palindrome (26021012062).

The spelling of 16011001001 in words is "sixteen billion, eleven million, one thousand, one".