11001111084520 has 16 divisors (see below), whose sum is σ = 24752499940260. Its totient is φ = 4400444433792.

The previous prime is 11001111084517. The next prime is 11001111084521. The reversal of 11001111084520 is 2548011110011.

It can be written as a sum of positive squares in 2 ways, for example, as 10099595016196 + 901516068324 = 3177986^2 + 949482^2 .

It is not an unprimeable number, because it can be changed into a prime (11001111084521) 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, 137513888517 + ... + 137513888596.

Almost surely, 2^{11001111084520} is an apocalyptic number.

11001111084520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11001111084520 is an abundant number, since it is smaller than the sum of its proper divisors (13751388855740).

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

11001111084520 is a wasteful number, since it uses less digits than its factorization.

11001111084520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275027777124 (or 275027777120 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 25.

Adding to 11001111084520 its reverse (2548011110011), we get a palindrome (13549122194531).

The spelling of 11001111084520 in words is "eleven trillion, one billion, one hundred eleven million, eighty-four thousand, five hundred twenty".