11122221171 has 16 divisors (see below), whose sum is σ = 14907454208. Its totient is φ = 7375989600.

The previous prime is 11122221139. The next prime is 11122221181. The reversal of 11122221171 is 17112222111.

It is not a de Polignac number, because 11122221171 - 2⁵ = 11122221139 is a prime.

It is a super-2 number, since 2×11122221171² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11122221181) 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 15 ways as a sum of consecutive naturals, for example, 513756 + ... + 534966.

It is an arithmetic number, because the mean of its divisors is an integer number (931715888).

Almost surely, 2^11122221171 is an apocalyptic number.

11122221171 is a deficient number, since it is larger than the sum of its proper divisors (3785233037).

11122221171 is a wasteful number, since it uses less digits than its factorization.

11122221171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22122.

The product of its digits is 112, while the sum is 21.

Adding to 11122221171 its reverse (17112222111), we get a palindrome (28234443282).

The spelling of 11122221171 in words is "eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred seventy-one".