1313341221 has 4 divisors (see below), whose sum is σ = 1751121632. Its totient is φ = 875560812.

The previous prime is 1313341201. The next prime is 1313341229. The reversal of 1313341221 is 1221433131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1221433131 = 3 ⋅407144377.

It is not a de Polignac number, because 1313341221 - 2⁶ = 1313341157 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 (1313341229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218890201 + ... + 218890206.

It is an arithmetic number, because the mean of its divisors is an integer number (437780408).

Almost surely, 2^1313341221 is an apocalyptic number.

It is an amenable number.

1313341221 is a deficient number, since it is larger than the sum of its proper divisors (437780411).

1313341221 is an equidigital number, since it uses as much as digits as its factorization.

1313341221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437780410.

The product of its digits is 432, while the sum is 21.

The square root of 1313341221 is about 36240.0499585748. The cubic root of 1313341221 is about 1095.1136488867.

Adding to 1313341221 its reverse (1221433131), we get a palindrome (2534774352).

The spelling of 1313341221 in words is "one billion, three hundred thirteen million, three hundred forty-one thousand, two hundred twenty-one".