1321103344 has 40 divisors (see below), whose sum is σ = 2798070912. Its totient is φ = 599267520.

The previous prime is 1321103341. The next prime is 1321103359. The reversal of 1321103344 is 4433011231.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81067 + ... + 95989.

Almost surely, 2^1321103344 is an apocalyptic number.

It is an amenable number.

1321103344 is an abundant number, since it is smaller than the sum of its proper divisors (1476967568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321103344 is a wasteful number, since it uses less digits than its factorization.

1321103344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15445 (or 15439 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1321103344 is about 36346.9853495445. The cubic root of 1321103344 is about 1097.2668631666.

Adding to 1321103344 its reverse (4433011231), we get a palindrome (5754114575).

It can be divided in two parts, 13 and 21103344, that multiplied together give a palindrome (274343472).

The spelling of 1321103344 in words is "one billion, three hundred twenty-one million, one hundred three thousand, three hundred forty-four".