13432020121 has 12 divisors (see below), whose sum is σ = 14548035180. Its totient is φ = 12395972160.

The previous prime is 13432020089. The next prime is 13432020131. The reversal of 13432020121 is 12102023431.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 398601225 + 13033418896 = 19965^2 + 114164^2 .

It is not a de Polignac number, because 13432020121 - 2⁵ = 13432020089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13432020131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1282735 + ... + 1293163.

It is an arithmetic number, because the mean of its divisors is an integer number (1212336265).

Almost surely, 2^13432020121 is an apocalyptic number.

It is an amenable number.

13432020121 is a deficient number, since it is larger than the sum of its proper divisors (1116015059).

13432020121 is a wasteful number, since it uses less digits than its factorization.

13432020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18076 (or 18063 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13432020121 its reverse (12102023431), we get a palindrome (25534043552).

The spelling of 13432020121 in words is "thirteen billion, four hundred thirty-two million, twenty thousand, one hundred twenty-one".