1121221244 has 24 divisors (see below), whose sum is σ = 2305169328. Its totient is φ = 470442240.

The previous prime is 1121221223. The next prime is 1121221253. The reversal of 1121221244 is 4421221211.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 979517 + ... + 980660.

It is an arithmetic number, because the mean of its divisors is an integer number (96048722).

Almost surely, 2^1121221244 is an apocalyptic number.

It is an amenable number.

1121221244 is an abundant number, since it is smaller than the sum of its proper divisors (1183948084).

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

1121221244 is a wasteful number, since it uses less digits than its factorization.

1121221244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960205 (or 1960203 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

The square root of 1121221244 is about 33484.6419123753. The cubic root of 1121221244 is about 1038.8761417284.

Adding to 1121221244 its reverse (4421221211), we get a palindrome (5542442455).

The spelling of 1121221244 in words is "one billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred forty-four".