11223111440 has 40 divisors (see below), whose sum is σ = 26131625088. Its totient is φ = 4482725760.

The previous prime is 11223111439. The next prime is 11223111461. The reversal of 11223111440 is 4411132211.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46232 + ... + 156791.

Almost surely, 2^11223111440 is an apocalyptic number.

11223111440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11223111440 is an abundant number, since it is smaller than the sum of its proper divisors (14908513648).

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

11223111440 is a wasteful number, since it uses less digits than its factorization.

11223111440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203727 (or 203721 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 11223111440 its reverse (4411132211), we get a palindrome (15634243651).

The spelling of 11223111440 in words is "eleven billion, two hundred twenty-three million, one hundred eleven thousand, four hundred forty".