1231121344 has 14 divisors (see below), whose sum is σ = 2443006544. Its totient is φ = 615560640.

The previous prime is 1231121341. The next prime is 1231121357. The reversal of 1231121344 is 4431211321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231121341) by changing a digit.

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 as a sum of consecutive naturals, namely, 9618072 + ... + 9618199.

Almost surely, 2^1231121344 is an apocalyptic number.

It is an amenable number.

1231121344 is a deficient number, since it is larger than the sum of its proper divisors (1211885200).

1231121344 is an equidigital number, since it uses as much as digits as its factorization.

1231121344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19236283 (or 19236273 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 1231121344 is about 35087.3387990597. The cubic root of 1231121344 is about 1071.7667681507.

Adding to 1231121344 its reverse (4431211321), we get a palindrome (5662332665).

The spelling of 1231121344 in words is "one billion, two hundred thirty-one million, one hundred twenty-one thousand, three hundred forty-four".