19000111111001 has 2 divisors, whose sum is σ = 19000111111002. Its totient is φ = 19000111111000.

The previous prime is 19000111110997. The next prime is 19000111111013. The reversal of 19000111111001 is 10011111100091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18795172915600 + 204938195401 = 4335340^2 + 452701^2 .

It is an emirp because it is prime and its reverse (10011111100091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19000111111001 - 2² = 19000111110997 is a prime.

It is a super-2 number, since 2×19000111111001² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19000111111901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9500055555500 + 9500055555501.

It is an arithmetic number, because the mean of its divisors is an integer number (9500055555501).

Almost surely, 2^{19000111111001} is an apocalyptic number.

It is an amenable number.

19000111111001 is a deficient number, since it is larger than the sum of its proper divisors (1).

19000111111001 is an equidigital number, since it uses as much as digits as its factorization.

19000111111001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 17.

Adding to 19000111111001 its reverse (10011111100091), we get a palindrome (29011222211092).

The spelling of 19000111111001 in words is "nineteen trillion, one hundred eleven million, one hundred eleven thousand, one".