1321321105 has 16 divisors (see below), whose sum is σ = 1743888384. Its totient is φ = 954982080.

The previous prime is 1321321103. The next prime is 1321321117. The reversal of 1321321105 is 5011231231.

It is not a de Polignac number, because 1321321105 - 2¹ = 1321321103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321321103) 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 in 15 ways as a sum of consecutive naturals, for example, 213201 + ... + 219310.

It is an arithmetic number, because the mean of its divisors is an integer number (108993024).

Almost surely, 2^1321321105 is an apocalyptic number.

It is an amenable number.

1321321105 is a deficient number, since it is larger than the sum of its proper divisors (422567279).

1321321105 is a wasteful number, since it uses less digits than its factorization.

1321321105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432576.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1321321105 is about 36349.9808115493. The cubic root of 1321321105 is about 1097.3271483323.

Adding to 1321321105 its reverse (5011231231), we get a palindrome (6332552336).

The spelling of 1321321105 in words is "one billion, three hundred twenty-one million, three hundred twenty-one thousand, one hundred five".