11123212044 has 48 divisors (see below), whose sum is σ = 30684729600. Its totient is φ = 3068471616.

The previous prime is 11123212031. The next prime is 11123212063. The reversal of 11123212044 is 44021232111.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 11123212044.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2280654 + ... + 2285525.

It is an arithmetic number, because the mean of its divisors is an integer number (639265200).

Almost surely, 2^11123212044 is an apocalyptic number.

11123212044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11123212044 is an abundant number, since it is smaller than the sum of its proper divisors (19561517556).

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

11123212044 is a wasteful number, since it uses less digits than its factorization.

11123212044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566222 (or 4566220 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 11123212044 its reverse (44021232111), we get a palindrome (55144444155).

The spelling of 11123212044 in words is "eleven billion, one hundred twenty-three million, two hundred twelve thousand, forty-four".