11220440550 has 192 divisors, whose sum is σ = 31347993600. Its totient is φ = 2632089600.

The previous prime is 11220440537. The next prime is 11220440599. The reversal of 11220440550 is 5504402211.

It is a super-2 number, since 2×11220440550² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11220440550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14590566 + ... + 14591334.

It is an arithmetic number, because the mean of its divisors is an integer number (163270800).

Almost surely, 2^11220440550 is an apocalyptic number.

11220440550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11220440550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15673996800).

11220440550 is an abundant number, since it is smaller than the sum of its proper divisors (20127553050).

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

11220440550 is a wasteful number, since it uses less digits than its factorization.

11220440550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 11220440550 its reverse (5504402211), we get a palindrome (16724842761).

The spelling of 11220440550 in words is "eleven billion, two hundred twenty million, four hundred forty thousand, five hundred fifty".