13442121321 has 16 divisors (see below), whose sum is σ = 18135120000. Its totient is φ = 8855884800.

The previous prime is 13442121283. The next prime is 13442121337. The reversal of 13442121321 is 12312124431.

It is not a de Polignac number, because 13442121321 - 2²⁵ = 13408566889 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13442121291 and 13442121300.

It is not an unprimeable number, because it can be changed into a prime (13442121361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10555 + ... + 164303.

It is an arithmetic number, because the mean of its divisors is an integer number (1133445000).

Almost surely, 2^13442121321 is an apocalyptic number.

It is an amenable number.

13442121321 is a deficient number, since it is larger than the sum of its proper divisors (4692998679).

13442121321 is a wasteful number, since it uses less digits than its factorization.

13442121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154096.

The product of its digits is 1152, while the sum is 24.

Adding to 13442121321 its reverse (12312124431), we get a palindrome (25754245752).

The spelling of 13442121321 in words is "thirteen billion, four hundred forty-two million, one hundred twenty-one thousand, three hundred twenty-one".