11102561 has 4 divisors (see below), whose sum is σ = 11290800. Its totient is φ = 10914324.

The previous prime is 11102551. The next prime is 11102573. The reversal of 11102561 is 16520111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16520111 = 29 ⋅569659.

It is a cyclic number.

It is not a de Polignac number, because 11102561 - 2¹⁰ = 11101537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11102521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94031 + ... + 94148.

It is an arithmetic number, because the mean of its divisors is an integer number (2822700).

Almost surely, 2^11102561 is an apocalyptic number.

It is an amenable number.

11102561 is a deficient number, since it is larger than the sum of its proper divisors (188239).

11102561 is an equidigital number, since it uses as much as digits as its factorization.

11102561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188238.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 11102561 is about 3332.0505698443. The cubic root of 11102561 is about 223.0870647452.

Adding to 11102561 its reverse (16520111), we get a palindrome (27622672).

The spelling of 11102561 in words is "eleven million, one hundred two thousand, five hundred sixty-one".