1101185089 has 4 divisors (see below), whose sum is σ = 1101455280. Its totient is φ = 1100914900.

The previous prime is 1101185023. The next prime is 1101185117. The reversal of 1101185089 is 9805811011.

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: 9805811011 = 647 ⋅15155813.

It is a cyclic number.

It is not a de Polignac number, because 1101185089 - 2¹³ = 1101176897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101185389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128887 + ... + 137164.

It is an arithmetic number, because the mean of its divisors is an integer number (275363820).

Almost surely, 2^1101185089 is an apocalyptic number.

It is an amenable number.

1101185089 is a deficient number, since it is larger than the sum of its proper divisors (270191).

1101185089 is an equidigital number, since it uses as much as digits as its factorization.

1101185089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270190.

The product of its (nonzero) digits is 2880, while the sum is 34.

The square root of 1101185089 is about 33184.1089830660. The cubic root of 1101185089 is about 1032.6506926527.

It can be divided in two parts, 11011 and 85089, that added together give a square (96100 = 310²).

The spelling of 1101185089 in words is "one billion, one hundred one million, one hundred eighty-five thousand, eighty-nine".