11525221511020 has 96 divisors (see below), whose sum is σ = 27865084036608. Its totient is φ = 3922288246272.

The previous prime is 11525221510997. The next prime is 11525221511033. The reversal of 11525221511020 is 2011512252511.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 11525221511020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 266254299 + ... + 266297581.

It is an arithmetic number, because the mean of its divisors is an integer number (290261292048).

Almost surely, 2^{11525221511020} is an apocalyptic number.

11525221511020 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 11525221511020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13932542018304).

11525221511020 is an abundant number, since it is smaller than the sum of its proper divisors (16339862525588).

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

11525221511020 is a wasteful number, since it uses less digits than its factorization.

11525221511020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57319 (or 57317 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 28.

Adding to 11525221511020 its reverse (2011512252511), we get a palindrome (13536733763531).

The spelling of 11525221511020 in words is "eleven trillion, five hundred twenty-five billion, two hundred twenty-one million, five hundred eleven thousand, twenty".