1121344221 has 8 divisors (see below), whose sum is σ = 1496873664. Its totient is φ = 746688800.

The previous prime is 1121344187. The next prime is 1121344229. The reversal of 1121344221 is 1224431211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121344221 - 2¹⁹ = 1120819933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121344229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 215505 + ... + 220646.

It is an arithmetic number, because the mean of its divisors is an integer number (187109208).

Almost surely, 2^1121344221 is an apocalyptic number.

It is an amenable number.

1121344221 is a deficient number, since it is larger than the sum of its proper divisors (375529443).

1121344221 is an equidigital number, since it uses as much as digits as its factorization.

1121344221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437011.

The product of its digits is 384, while the sum is 21.

The square root of 1121344221 is about 33486.4781814989. The cubic root of 1121344221 is about 1038.9141221007.

Adding to 1121344221 its reverse (1224431211), we get a palindrome (2345775432).

The spelling of 1121344221 in words is "one billion, one hundred twenty-one million, three hundred forty-four thousand, two hundred twenty-one".