313103315221 has 4 divisors (see below), whose sum is σ = 320384787712. Its totient is φ = 305821842732.

The previous prime is 313103315201. The next prime is 313103315249. The reversal of 313103315221 is 122513301313.

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 313103315221 - 2²¹ = 313101218069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313103315201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3640736181 + ... + 3640736266.

It is an arithmetic number, because the mean of its divisors is an integer number (80096196928).

Almost surely, 2^313103315221 is an apocalyptic number.

It is an amenable number.

313103315221 is a deficient number, since it is larger than the sum of its proper divisors (7281472491).

313103315221 is an equidigital number, since it uses as much as digits as its factorization.

313103315221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7281472490.

The product of its (nonzero) digits is 1620, while the sum is 25.

Adding to 313103315221 its reverse (122513301313), we get a palindrome (435616616534).

The spelling of 313103315221 in words is "three hundred thirteen billion, one hundred three million, three hundred fifteen thousand, two hundred twenty-one".