11801179181 has 16 divisors (see below), whose sum is σ = 13442969088. Its totient is φ = 10254855600.

The previous prime is 11801179171. The next prime is 11801179213. The reversal of 11801179181 is 18197110811.

It is not a de Polignac number, because 11801179181 - 2²² = 11796984877 is a prime.

It is a super-2 number, since 2×11801179181² (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 (11801179141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372110 + ... + 402576.

It is an arithmetic number, because the mean of its divisors is an integer number (840185568).

Almost surely, 2^11801179181 is an apocalyptic number.

11801179181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11801179181 is a deficient number, since it is larger than the sum of its proper divisors (1641789907).

11801179181 is a wasteful number, since it uses less digits than its factorization.

11801179181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32032.

The product of its (nonzero) digits is 4032, while the sum is 38.

Adding to 11801179181 its reverse (18197110811), we get a palindrome (29998289992).

The spelling of 11801179181 in words is "eleven billion, eight hundred one million, one hundred seventy-nine thousand, one hundred eighty-one".