11121143440 has 160 divisors (see below), whose sum is σ = 28834154496. Its totient is φ = 3955207680.

The previous prime is 11121143437. The next prime is 11121143477. The reversal of 11121143440 is 4434112111.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7814569 + ... + 7815991.

Almost surely, 2^11121143440 is an apocalyptic number.

11121143440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11121143440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14417077248).

11121143440 is an abundant number, since it is smaller than the sum of its proper divisors (17713011056).

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

11121143440 is a wasteful number, since it uses less digits than its factorization.

11121143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 11121143440 its reverse (4434112111), we get a palindrome (15555255551).

The spelling of 11121143440 in words is "eleven billion, one hundred twenty-one million, one hundred forty-three thousand, four hundred forty".