1321300221 has 16 divisors (see below), whose sum is σ = 1795590720. Its totient is φ = 864005120.

The previous prime is 1321300207. The next prime is 1321300247. The reversal of 1321300221 is 1220031231.

It is a cyclic number.

It is not a de Polignac number, because 1321300221 - 2¹⁴ = 1321283837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321300221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321300121) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 73501 + ... + 89693.

It is an arithmetic number, because the mean of its divisors is an integer number (112224420).

Almost surely, 2^1321300221 is an apocalyptic number.

It is an amenable number.

1321300221 is a deficient number, since it is larger than the sum of its proper divisors (474290499).

1321300221 is a wasteful number, since it uses less digits than its factorization.

1321300221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16716.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1321300221 is about 36349.6935475390. The cubic root of 1321300221 is about 1097.3213670727.

Adding to 1321300221 its reverse (1220031231), we get a palindrome (2541331452).

The spelling of 1321300221 in words is "one billion, three hundred twenty-one million, three hundred thousand, two hundred twenty-one".