1321034216 has 16 divisors (see below), whose sum is σ = 2562351300. Its totient is φ = 637740544.

The previous prime is 1321034191. The next prime is 1321034251. The reversal of 1321034216 is 6124301231.

It can be written as a sum of positive squares in 2 ways, for example, as 1321031716 + 2500 = 36346^2 + 50^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1321034191 and 1321034200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2846825 + ... + 2847288.

Almost surely, 2^1321034216 is an apocalyptic number.

It is an amenable number.

1321034216 is a deficient number, since it is larger than the sum of its proper divisors (1241317084).

1321034216 is a wasteful number, since it uses less digits than its factorization.

1321034216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5694148 (or 5694144 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1321034216 is about 36346.0343916637. The cubic root of 1321034216 is about 1097.2477243190.

Adding to 1321034216 its reverse (6124301231), we get a palindrome (7445335447).

The spelling of 1321034216 in words is "one billion, three hundred twenty-one million, thirty-four thousand, two hundred sixteen".