11001000001081 has 2 divisors, whose sum is σ = 11001000001082. Its totient is φ = 11001000001080.

The previous prime is 11001000001063. The next prime is 11001000001127. The reversal of 11001000001081 is 18010000010011.

11001000001081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10793136954681 + 207863046400 = 3285291^2 + 455920^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001000001081 - 2⁷ = 11001000000953 is a prime.

It is a super-2 number, since 2×11001000001081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11001000001181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500500000540 + 5500500000541.

It is an arithmetic number, because the mean of its divisors is an integer number (5500500000541).

Almost surely, 2^{11001000001081} is an apocalyptic number.

It is an amenable number.

11001000001081 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001000001081 is an equidigital number, since it uses as much as digits as its factorization.

11001000001081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11001000001081 its reverse (18010000010011), we get a palindrome (29011000011092).

The spelling of 11001000001081 in words is "eleven trillion, one billion, one thousand, eighty-one".