11671112181 has 8 divisors (see below), whose sum is σ = 15562381120. Its totient is φ = 7780292352.

The previous prime is 11671112179. The next prime is 11671112213. The reversal of 11671112181 is 18121117611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11671112181 - 2¹ = 11671112179 is a prime.

It is a super-2 number, since 2×11671112181² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11671112161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46060 + ... + 159573.

It is an arithmetic number, because the mean of its divisors is an integer number (1945297640).

Almost surely, 2^11671112181 is an apocalyptic number.

It is an amenable number.

11671112181 is a deficient number, since it is larger than the sum of its proper divisors (3891268939).

11671112181 is a wasteful number, since it uses less digits than its factorization.

11671112181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224555.

The product of its digits is 672, while the sum is 30.

Adding to 11671112181 its reverse (18121117611), we get a palindrome (29792229792).

The spelling of 11671112181 in words is "eleven billion, six hundred seventy-one million, one hundred twelve thousand, one hundred eighty-one".