11121004544 has 104 divisors (see below), whose sum is σ = 24286577112. Its totient is φ = 5060689920.

The previous prime is 11121004481. The next prime is 11121004547. The reversal of 11121004544 is 44540012111.

It can be written as a sum of positive squares in 4 ways, for example, as 739840000 + 10381164544 = 27200^2 + 101888^2 .

It is a tau number, because it is divible by the number of its divisors (104).

It is not an unprimeable number, because it can be changed into a prime (11121004547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3885674 + ... + 3888534.

Almost surely, 2^11121004544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11121004544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12143288556).

11121004544 is an abundant number, since it is smaller than the sum of its proper divisors (13165572568).

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

11121004544 is an equidigital number, since it uses as much as digits as its factorization.

11121004544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971 (or 2949 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 11121004544 its reverse (44540012111), we get a palindrome (55661016655).

The spelling of 11121004544 in words is "eleven billion, one hundred twenty-one million, four thousand, five hundred forty-four".