11881118811 has 16 divisors (see below), whose sum is σ = 16062105600. Its totient is φ = 7810690368.

The previous prime is 11881118783. The next prime is 11881118819.

It is a happy number.

11881118811 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 11881118811 - 2¹⁸ = 11880856667 is a prime.

11881118811 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 11881118811.

It is not an unprimeable number, because it can be changed into a prime (11881118819) 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, 160750 + ... + 222716.

It is an arithmetic number, because the mean of its divisors is an integer number (1003881600).

Almost surely, 2^11881118811 is an apocalyptic number.

11881118811 is a deficient number, since it is larger than the sum of its proper divisors (4180986789).

11881118811 is an equidigital number, since it uses as much as digits as its factorization.

11881118811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62858.

The product of its digits is 4096, while the sum is 39.

The spelling of 11881118811 in words is "eleven billion, eight hundred eighty-one million, one hundred eighteen thousand, eight hundred eleven".