1121111240 has 64 divisors (see below), whose sum is σ = 2684761200. Its totient is φ = 419872768.

The previous prime is 1121111239. The next prime is 1121111267. The reversal of 1121111240 is 421111211.

It can be written as a sum of positive squares in 8 ways, for example, as 1040578564 + 80532676 = 32258^2 + 8974^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129776 + ... + 138144.

Almost surely, 2^1121111240 is an apocalyptic number.

1121111240 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 1121111240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1342380600).

1121111240 is an abundant number, since it is smaller than the sum of its proper divisors (1563649960).

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

1121111240 is a wasteful number, since it uses less digits than its factorization.

1121111240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8594 (or 8590 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 1121111240 is about 33482.9992682854. Note that the first 3 decimals coincide. The cubic root of 1121111240 is about 1038.8421656007.

Adding to 1121111240 its reverse (421111211), we get a palindrome (1542222451).

The spelling of 1121111240 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, two hundred forty".