1321103343 has 8 divisors (see below), whose sum is σ = 2013109888. Its totient is φ = 754916184.

The previous prime is 1321103341. The next prime is 1321103359. The reversal of 1321103343 is 3433011231.

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

It is not a de Polignac number, because 1321103343 - 2¹ = 1321103341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 62909683 = 1321103343 / (1 + 3 + 2 + 1 + 1 + 0 + 3 + 3 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321103341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31454821 + ... + 31454862.

It is an arithmetic number, because the mean of its divisors is an integer number (251638736).

Almost surely, 2^1321103343 is an apocalyptic number.

1321103343 is a deficient number, since it is larger than the sum of its proper divisors (692006545).

1321103343 is an equidigital number, since it uses as much as digits as its factorization.

1321103343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62909693.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1321103343 is about 36346.9853357882. The cubic root of 1321103343 is about 1097.2668628897.

Adding to 1321103343 its reverse (3433011231), we get a palindrome (4754114574).

The spelling of 1321103343 in words is "one billion, three hundred twenty-one million, one hundred three thousand, three hundred forty-three".