1313421321 has 8 divisors (see below), whose sum is σ = 1758495904. Its totient is φ = 871980480.

The previous prime is 1313421287. The next prime is 1313421323. The reversal of 1313421321 is 1231243131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1313421321 - 2¹⁵ = 1313388553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313421323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907591 + ... + 909036.

It is an arithmetic number, because the mean of its divisors is an integer number (219811988).

Almost surely, 2^1313421321 is an apocalyptic number.

It is an amenable number.

1313421321 is a deficient number, since it is larger than the sum of its proper divisors (445074583).

1313421321 is a wasteful number, since it uses less digits than its factorization.

1313421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816871.

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

The square root of 1313421321 is about 36241.1550726519. The cubic root of 1313421321 is about 1095.1359119053.

Adding to 1313421321 its reverse (1231243131), we get a palindrome (2544664452).

The spelling of 1313421321 in words is "one billion, three hundred thirteen million, four hundred twenty-one thousand, three hundred twenty-one".