11171117020 has 72 divisors (see below), whose sum is σ = 28475997984. Its totient is φ = 3663563904.

The previous prime is 11171117011. The next prime is 11171117033. The reversal of 11171117020 is 2071117111.

It is a junction number, because it is equal to n+sod(n) for n = 11171116982 and 11171117000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 225267 + ... + 270346.

It is an arithmetic number, because the mean of its divisors is an integer number (395499972).

Almost surely, 2^11171117020 is an apocalyptic number.

11171117020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11171117020 is an abundant number, since it is smaller than the sum of its proper divisors (17304880964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11171117020 is a wasteful number, since it uses less digits than its factorization.

11171117020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495659 (or 495650 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 22.

Subtracting from 11171117020 its reverse (2071117111), we obtain a palindrome (9099999909).

The spelling of 11171117020 in words is "eleven billion, one hundred seventy-one million, one hundred seventeen thousand, twenty".