11012261163561 has 96 divisors (see below), whose sum is σ = 19587182883840. Its totient is φ = 5820979635072.

The previous prime is 11012261163503. The next prime is 11012261163569. The reversal of 11012261163561 is 16536116221011.

11012261163561 is a `hidden beast` number, since 1 + 1 + 0 + 1 + 2 + 2 + 6 + 11 + 635 + 6 + 1 = 666.

11012261163561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11012261163561 - 2⁷ = 11012261163433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11012261163569) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 164828215 + ... + 164895011.

It is an arithmetic number, because the mean of its divisors is an integer number (204033155040).

Almost surely, 2^{11012261163561} is an apocalyptic number.

It is an amenable number.

11012261163561 is a deficient number, since it is larger than the sum of its proper divisors (8574921720279).

11012261163561 is a wasteful number, since it uses less digits than its factorization.

11012261163561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70075 (or 70072 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

Adding to 11012261163561 its reverse (16536116221011), we get a palindrome (27548377384572).

The spelling of 11012261163561 in words is "eleven trillion, twelve billion, two hundred sixty-one million, one hundred sixty-three thousand, five hundred sixty-one".