1313324221 has 4 divisors (see below), whose sum is σ = 1432717344. Its totient is φ = 1193931100.

The previous prime is 1313324197. The next prime is 1313324231. The reversal of 1313324221 is 1224233131.

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 1313324221 - 2²⁷ = 1179106493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313324192 and 1313324201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313324231) 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, 59696545 + ... + 59696566.

It is an arithmetic number, because the mean of its divisors is an integer number (358179336).

Almost surely, 2^1313324221 is an apocalyptic number.

1313324221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1313324221 is a deficient number, since it is larger than the sum of its proper divisors (119393123).

1313324221 is a wasteful number, since it uses less digits than its factorization.

1313324221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119393122.

The product of its digits is 864, while the sum is 22.

The square root of 1313324221 is about 36239.8154106778. The cubic root of 1313324221 is about 1095.1089237851.

Adding to 1313324221 its reverse (1224233131), we get a palindrome (2537557352).

The spelling of 1313324221 in words is "one billion, three hundred thirteen million, three hundred twenty-four thousand, two hundred twenty-one".