1101185118 has 80 divisors (see below), whose sum is σ = 2703926016. Its totient is φ = 333561240.

The previous prime is 1101185117. The next prime is 1101185161. The reversal of 1101185118 is 8115811011.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1101185091 and 1101185100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101185117) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 431755 + ... + 434297.

Almost surely, 2^1101185118 is an apocalyptic number.

1101185118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101185118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1351963008).

1101185118 is an abundant number, since it is smaller than the sum of its proper divisors (1602740898).

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

1101185118 is an frugal number, since it uses more digits than its factorization.

1101185118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583 (or 2559 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 27.

The square root of 1101185118 is about 33184.1094200221. The cubic root of 1101185118 is about 1032.6507017177.

Adding to 1101185118 its reverse (8115811011), we get a palindrome (9216996129).

The spelling of 1101185118 in words is "one billion, one hundred one million, one hundred eighty-five thousand, one hundred eighteen".