1321120244 has 12 divisors (see below), whose sum is σ = 2317906500. Its totient is φ = 658861248.

The previous prime is 1321120243. The next prime is 1321120343. The reversal of 1321120244 is 4420211231.

It can be written as a sum of positive squares in 2 ways, for example, as 91776400 + 1229343844 = 9580^2 + 35062^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321120243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422969 + ... + 426080.

It is an arithmetic number, because the mean of its divisors is an integer number (193158875).

Almost surely, 2^1321120244 is an apocalyptic number.

It is an amenable number.

1321120244 is a deficient number, since it is larger than the sum of its proper divisors (996786256).

1321120244 is a wasteful number, since it uses less digits than its factorization.

1321120244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849442 (or 849440 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1321120244 is about 36347.2178302549. The cubic root of 1321120244 is about 1097.2715420160.

Adding to 1321120244 its reverse (4420211231), we get a palindrome (5741331475).

The spelling of 1321120244 in words is "one billion, three hundred twenty-one million, one hundred twenty thousand, two hundred forty-four".