11234567788891 has 4 divisors (see below), whose sum is σ = 11239429135984. Its totient is φ = 11229706441800.

The previous prime is 11234567788889. The next prime is 11234567788949. The reversal of 11234567788891 is 19888776543211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11234567788891 - 2¹ = 11234567788889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11234567788891.

It is not an unprimeable number, because it can be changed into a prime (11234567788841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2430670080 + ... + 2430674701.

It is an arithmetic number, because the mean of its divisors is an integer number (2809857283996).

Almost surely, 2^{11234567788891} is an apocalyptic number.

11234567788891 is a deficient number, since it is larger than the sum of its proper divisors (4861347093).

11234567788891 is an equidigital number, since it uses as much as digits as its factorization.

11234567788891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4861347092.

The product of its digits is 162570240, while the sum is 70.

The spelling of 11234567788891 in words is "eleven trillion, two hundred thirty-four billion, five hundred sixty-seven million, seven hundred eighty-eight thousand, eight hundred ninety-one".