11001010561 has 16 divisors (see below), whose sum is σ = 11708686080. Its totient is φ = 10312885440.

The previous prime is 11001010541. The next prime is 11001010577. The reversal of 11001010561 is 16501010011.

It is a cyclic number.

It is not a de Polignac number, because 11001010561 - 2²⁹ = 10464139649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11001010511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1240180 + ... + 1249018.

It is an arithmetic number, because the mean of its divisors is an integer number (731792880).

Almost surely, 2^11001010561 is an apocalyptic number.

It is an amenable number.

11001010561 is a deficient number, since it is larger than the sum of its proper divisors (707675519).

11001010561 is a wasteful number, since it uses less digits than its factorization.

11001010561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9936.

The product of its (nonzero) digits is 30, while the sum is 16.

Adding to 11001010561 its reverse (16501010011), we get a palindrome (27502020572).

The spelling of 11001010561 in words is "eleven billion, one million, ten thousand, five hundred sixty-one".