13201203121 has 4 divisors (see below), whose sum is σ = 13248861172. Its totient is φ = 13153545072.

The previous prime is 13201203109. The next prime is 13201203131. The reversal of 13201203121 is 12130210231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3338528400 + 9862674721 = 57780^2 + 99311^2 .

It is a cyclic number.

It is not a de Polignac number, because 13201203121 - 2¹¹ = 13201201073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13201203095 and 13201203104.

It is not an unprimeable number, because it can be changed into a prime (13201203131) 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 3 ways as a sum of consecutive naturals, for example, 23828610 + ... + 23829163.

It is an arithmetic number, because the mean of its divisors is an integer number (3312215293).

Almost surely, 2^13201203121 is an apocalyptic number.

It is an amenable number.

13201203121 is a deficient number, since it is larger than the sum of its proper divisors (47658051).

13201203121 is an equidigital number, since it uses as much as digits as its factorization.

13201203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47658050.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13201203121 its reverse (12130210231), we get a palindrome (25331413352).

The spelling of 13201203121 in words is "thirteen billion, two hundred one million, two hundred three thousand, one hundred twenty-one".