1321144443 has 24 divisors (see below), whose sum is σ = 2022134400. Its totient is φ = 828313344.

The previous prime is 1321144441. The next prime is 1321144457. The reversal of 1321144443 is 3444411231.

1321144443 is a `hidden beast` number, since 1 + 3 + 211 + 4 + 4 + 443 = 666.

It is not a de Polignac number, because 1321144443 - 2¹ = 1321144441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321144441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266673 + ... + 271581.

It is an arithmetic number, because the mean of its divisors is an integer number (84255600).

Almost surely, 2^1321144443 is an apocalyptic number.

1321144443 is a deficient number, since it is larger than the sum of its proper divisors (700989957).

1321144443 is a wasteful number, since it uses less digits than its factorization.

1321144443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6691 (or 6688 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 1321144443 is about 36347.5507152820. The cubic root of 1321144443 is about 1097.2782415606.

Adding to 1321144443 its reverse (3444411231), we get a palindrome (4765555674).

The spelling of 1321144443 in words is "one billion, three hundred twenty-one million, one hundred forty-four thousand, four hundred forty-three".