1121222124 has 144 divisors (see below), whose sum is σ = 3245598720. Its totient is φ = 323051520.

The previous prime is 1121222117. The next prime is 1121222171. The reversal of 1121222124 is 4212221211.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1121222097 and 1121222106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2340517 + ... + 2340995.

It is an arithmetic number, because the mean of its divisors is an integer number (22538880).

Almost surely, 2^1121222124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121222124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1622799360).

1121222124 is an abundant number, since it is smaller than the sum of its proper divisors (2124376596).

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

1121222124 is a wasteful number, since it uses less digits than its factorization.

1121222124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 775 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 1121222124 is about 33484.6550527253. The cubic root of 1121222124 is about 1038.8764135186.

Adding to 1121222124 its reverse (4212221211), we get a palindrome (5333443335).

The spelling of 1121222124 in words is "one billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-four".