11111030320 has 80 divisors (see below), whose sum is σ = 27848530080. Its totient is φ = 4098373632.

The previous prime is 11111030269. The next prime is 11111030321. The reversal of 11111030320 is 2303011111.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 11111030320.

It is not an unprimeable number, because it can be changed into a prime (11111030321) 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, 1136011 + ... + 1145749.

It is an arithmetic number, because the mean of its divisors is an integer number (348106626).

Almost surely, 2^11111030320 is an apocalyptic number.

11111030320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111030320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13924265040).

11111030320 is an abundant number, since it is smaller than the sum of its proper divisors (16737499760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111030320 is a wasteful number, since it uses less digits than its factorization.

11111030320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10862 (or 10856 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 11111030320 its reverse (2303011111), we get a palindrome (13414041431).

The spelling of 11111030320 in words is "eleven billion, one hundred eleven million, thirty thousand, three hundred twenty".