1313213421 has 24 divisors (see below), whose sum is σ = 1930617696. Its totient is φ = 789294240.

The previous prime is 1313213411. The next prime is 1313213431. The reversal of 1313213421 is 1243123131.

1313213421 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1313213411) and next prime (1313213431).

It is not a de Polignac number, because 1313213421 - 2⁵ = 1313213389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313213411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63006 + ... + 81216.

It is an arithmetic number, because the mean of its divisors is an integer number (80442404).

Almost surely, 2^1313213421 is an apocalyptic number.

It is an amenable number.

1313213421 is a deficient number, since it is larger than the sum of its proper divisors (617404275).

1313213421 is a wasteful number, since it uses less digits than its factorization.

1313213421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18313 (or 18270 counting only the distinct ones).

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

The square root of 1313213421 is about 36238.2866730755. The cubic root of 1313213421 is about 1095.0781262411.

Adding to 1313213421 its reverse (1243123131), we get a palindrome (2556336552).

The spelling of 1313213421 in words is "one billion, three hundred thirteen million, two hundred thirteen thousand, four hundred twenty-one".