1101185087 has 4 divisors (see below), whose sum is σ = 1101265080. Its totient is φ = 1101105096.

The previous prime is 1101185023. The next prime is 1101185117. The reversal of 1101185087 is 7805811011.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7805811011 = 44917 ⋅173783.

It is a cyclic number.

It is not a de Polignac number, because 1101185087 - 2⁶ = 1101185023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101185287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13493 + ... + 48830.

It is an arithmetic number, because the mean of its divisors is an integer number (275316270).

Almost surely, 2^1101185087 is an apocalyptic number.

1101185087 is a deficient number, since it is larger than the sum of its proper divisors (79993).

1101185087 is an equidigital number, since it uses as much as digits as its factorization.

1101185087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79992.

The product of its (nonzero) digits is 2240, while the sum is 32.

The square root of 1101185087 is about 33184.1089529311. The cubic root of 1101185087 is about 1032.6506920275.

Adding to 1101185087 its reverse (7805811011), we get a palindrome (8906996098).

The spelling of 1101185087 in words is "one billion, one hundred one million, one hundred eighty-five thousand, eighty-seven".