11123223144 has 192 divisors, whose sum is σ = 31487037120. Its totient is φ = 3270220800.

The previous prime is 11123223103. The next prime is 11123223157. The reversal of 11123223144 is 44132232111.

It is a super-2 number, since 2×11123223144² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35088874 + ... + 35089190.

It is an arithmetic number, because the mean of its divisors is an integer number (163994985).

Almost surely, 2^11123223144 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 11123223144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15743518560).

11123223144 is an abundant number, since it is smaller than the sum of its proper divisors (20363813976).

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

11123223144 is a wasteful number, since it uses less digits than its factorization.

11123223144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672 (or 657 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 11123223144 its reverse (44132232111), we get a palindrome (55255455255).

The spelling of 11123223144 in words is "eleven billion, one hundred twenty-three million, two hundred twenty-three thousand, one hundred forty-four".