11011223440 has 160 divisors (see below), whose sum is σ = 30364128000. Its totient is φ = 3633444864.

The previous prime is 11011223437. The next prime is 11011223519. The reversal of 11011223440 is 4432211011.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6154066 + ... + 6155854.

It is an arithmetic number, because the mean of its divisors is an integer number (189775800).

Almost surely, 2^11011223440 is an apocalyptic number.

11011223440 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 11011223440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15182064000).

11011223440 is an abundant number, since it is smaller than the sum of its proper divisors (19352904560).

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

11011223440 is a wasteful number, since it uses less digits than its factorization.

11011223440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217 (or 2211 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 11011223440 its reverse (4432211011), we get a palindrome (15443434451).

The spelling of 11011223440 in words is "eleven billion, eleven million, two hundred twenty-three thousand, four hundred forty".