11123223440 has 60 divisors (see below), whose sum is σ = 30083789916. Its totient is φ = 3813675264.

The previous prime is 11123223439. The next prime is 11123223469. The reversal of 11123223440 is 4432232111.

It can be written as a sum of positive squares in 2 ways, for example, as 7451832976 + 3671390464 = 86324^2 + 60592^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1414859 + ... + 1422698.

Almost surely, 2^11123223440 is an apocalyptic number.

11123223440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11123223440 is an abundant number, since it is smaller than the sum of its proper divisors (18960566476).

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

11123223440 is a wasteful number, since it uses less digits than its factorization.

11123223440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837584 (or 2837571 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 11123223440 its reverse (4432232111), we get a palindrome (15555455551).

The spelling of 11123223440 in words is "eleven billion, one hundred twenty-three million, two hundred twenty-three thousand, four hundred forty".