315221103321 has 4 divisors (see below), whose sum is σ = 420294804432. Its totient is φ = 210147402212.

The previous prime is 315221103289. The next prime is 315221103361. The reversal of 315221103321 is 123301122513.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 315221103321 - 2⁵ = 315221103289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 315221103291 and 315221103300.

It is not an unprimeable number, because it can be changed into a prime (315221103361) 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 3 ways as a sum of consecutive naturals, for example, 52536850551 + ... + 52536850556.

It is an arithmetic number, because the mean of its divisors is an integer number (105073701108).

Almost surely, 2^315221103321 is an apocalyptic number.

It is an amenable number.

315221103321 is a deficient number, since it is larger than the sum of its proper divisors (105073701111).

315221103321 is a wasteful number, since it uses less digits than its factorization.

315221103321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105073701110.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 315221103321 its reverse (123301122513), we get a palindrome (438522225834).

The spelling of 315221103321 in words is "three hundred fifteen billion, two hundred twenty-one million, one hundred three thousand, three hundred twenty-one".