11122166565 has 32 divisors (see below), whose sum is σ = 20454566400. Its totient is φ = 5727274560.

The previous prime is 11122166563. The next prime is 11122166597. The reversal of 11122166565 is 56566122111.

11122166565 is a `hidden beast` number, since 1 + 1 + 12 + 21 + 66 + 565 = 666.

It is not a de Polignac number, because 11122166565 - 2¹ = 11122166563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122166563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1416541 + ... + 1424370.

It is an arithmetic number, because the mean of its divisors is an integer number (639205200).

Almost surely, 2^11122166565 is an apocalyptic number.

11122166565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11122166565 is a deficient number, since it is larger than the sum of its proper divisors (9332399835).

11122166565 is a wasteful number, since it uses less digits than its factorization.

11122166565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2840954 (or 2840948 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

Adding to 11122166565 its reverse (56566122111), we get a palindrome (67688288676).

The spelling of 11122166565 in words is "eleven billion, one hundred twenty-two million, one hundred sixty-six thousand, five hundred sixty-five".