1100113181 has 4 divisors (see below), whose sum is σ = 1111454652. Its totient is φ = 1088771712.

The previous prime is 1100113169. The next prime is 1100113211. The reversal of 1100113181 is 1813110011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1813110011 = 751 ⋅2414261.

It can be written as a sum of positive squares in 2 ways, for example, as 161671225 + 938441956 = 12715^2 + 30634^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100113181 - 2²² = 1095918877 is a prime.

It is a super-2 number, since 2×1100113181² = 2420498022019877522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100113111) 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, 5670590 + ... + 5670783.

It is an arithmetic number, because the mean of its divisors is an integer number (277863663).

Almost surely, 2^1100113181 is an apocalyptic number.

It is an amenable number.

1100113181 is a deficient number, since it is larger than the sum of its proper divisors (11341471).

1100113181 is an equidigital number, since it uses as much as digits as its factorization.

1100113181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11341470.

The product of its (nonzero) digits is 24, while the sum is 17.

The square root of 1100113181 is about 33167.9541274405. The cubic root of 1100113181 is about 1032.3155186348.

Adding to 1100113181 its reverse (1813110011), we get a palindrome (2913223192).

The spelling of 1100113181 in words is "one billion, one hundred million, one hundred thirteen thousand, one hundred eighty-one".