11155000001 has 2 divisors, whose sum is σ = 11155000002. Its totient is φ = 11155000000.

The previous prime is 11154999983. The next prime is 11155000009. The reversal of 11155000001 is 10000055111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8675059600 + 2479940401 = 93140^2 + 49799^2 .

It is a cyclic number.

It is not a de Polignac number, because 11155000001 - 2²⁶ = 11087891137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11155000001.

It is not a weakly prime, because it can be changed into another prime (11155000009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5577500000 + 5577500001.

It is an arithmetic number, because the mean of its divisors is an integer number (5577500001).

Almost surely, 2^11155000001 is an apocalyptic number.

It is an amenable number.

11155000001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155000001 is an equidigital number, since it uses as much as digits as its factorization.

11155000001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25, while the sum is 14.

Adding to 11155000001 its reverse (10000055111), we get a palindrome (21155055112).

The spelling of 11155000001 in words is "eleven billion, one hundred fifty-five million, one", and thus it is an aban number.