13243133421 has 96 divisors (see below), whose sum is σ = 23466854400. Its totient is φ = 7355668320.

The previous prime is 13243133419. The next prime is 13243133441. The reversal of 13243133421 is 12433134231.

It is a happy number.

13243133421 is a `hidden beast` number, since 1 + 3 + 2 + 4 + 313 + 342 + 1 = 666.

It is not a de Polignac number, because 13243133421 - 2¹ = 13243133419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13243133441) 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 95 ways as a sum of consecutive naturals, for example, 15416490 + ... + 15417348.

It is an arithmetic number, because the mean of its divisors is an integer number (244446400).

Almost surely, 2^13243133421 is an apocalyptic number.

It is an amenable number.

13243133421 is a deficient number, since it is larger than the sum of its proper divisors (10223720979).

13243133421 is a wasteful number, since it uses less digits than its factorization.

13243133421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196 (or 1183 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 13243133421 its reverse (12433134231), we get a palindrome (25676267652).

The spelling of 13243133421 in words is "thirteen billion, two hundred forty-three million, one hundred thirty-three thousand, four hundred twenty-one".