11121464440 has 64 divisors (see below), whose sum is σ = 25940152800. Its totient is φ = 4287840768.

The previous prime is 11121464339. The next prime is 11121464467. The reversal of 11121464440 is 4446412111.

It is a junction number, because it is equal to n+sod(n) for n = 11121464399 and 11121464408.

It is a congruent number.

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, 123246 + ... + 193474.

Almost surely, 2^11121464440 is an apocalyptic number.

11121464440 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 11121464440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12970076400).

11121464440 is an abundant number, since it is smaller than the sum of its proper divisors (14818688360).

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

11121464440 is a wasteful number, since it uses less digits than its factorization.

11121464440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70384 (or 70380 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 11121464440 its reverse (4446412111), we get a palindrome (15567876551).

The spelling of 11121464440 in words is "eleven billion, one hundred twenty-one million, four hundred sixty-four thousand, four hundred forty".