1121144550 has 48 divisors (see below), whose sum is σ = 2827586880. Its totient is φ = 293902240.

The previous prime is 1121144539. The next prime is 1121144551. The reversal of 1121144550 is 554411211.

1121144550 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1121144550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121144551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54492 + ... + 72191.

It is an arithmetic number, because the mean of its divisors is an integer number (58908060).

Almost surely, 2^1121144550 is an apocalyptic number.

1121144550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121144550 is an abundant number, since it is smaller than the sum of its proper divisors (1706442330).

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

1121144550 is a wasteful number, since it uses less digits than its factorization.

1121144550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126757 (or 126752 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1121144550 is about 33483.4966812010. The cubic root of 1121144550 is about 1038.8524540504.

Adding to 1121144550 its reverse (554411211), we get a palindrome (1675555761).

The spelling of 1121144550 in words is "one billion, one hundred twenty-one million, one hundred forty-four thousand, five hundred fifty".