13321234421 has 4 divisors (see below), whose sum is σ = 14532255744. Its totient is φ = 12110213100.

The previous prime is 13321234403. The next prime is 13321234447. The reversal of 13321234421 is 12443212331.

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: 12443212331 = 11 ⋅1131201121.

It is a cyclic number.

It is not a de Polignac number, because 13321234421 - 2²⁶ = 13254125557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13321234721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 605510645 + ... + 605510666.

It is an arithmetic number, because the mean of its divisors is an integer number (3633063936).

Almost surely, 2^13321234421 is an apocalyptic number.

13321234421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13321234421 is a deficient number, since it is larger than the sum of its proper divisors (1211021323).

13321234421 is a wasteful number, since it uses less digits than its factorization.

13321234421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211021322.

The product of its digits is 3456, while the sum is 26.

Adding to 13321234421 its reverse (12443212331), we get a palindrome (25764446752).

It can be divided in two parts, 13321 and 234421, that added together give a palindrome (247742).

The spelling of 13321234421 in words is "thirteen billion, three hundred twenty-one million, two hundred thirty-four thousand, four hundred twenty-one".