13320203121 has 24 divisors (see below), whose sum is σ = 19926789480. Its totient is φ = 8564000256.

The previous prime is 13320203107. The next prime is 13320203129. The reversal of 13320203121 is 12130202331.

13320203121 is a `hidden beast` number, since 1 + 332 + 0 + 20 + 312 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4184666721 + 9135536400 = 64689^2 + 95580^2 .

It is not a de Polignac number, because 13320203121 - 2⁵ = 13320203089 is a prime.

It is a super-2 number, since 2×13320203121² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13320203094 and 13320203103.

It is not an unprimeable number, because it can be changed into a prime (13320203129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199801 + ... + 257993.

It is an arithmetic number, because the mean of its divisors is an integer number (830282895).

Almost surely, 2^13320203121 is an apocalyptic number.

It is an amenable number.

13320203121 is a deficient number, since it is larger than the sum of its proper divisors (6606586359).

13320203121 is a wasteful number, since it uses less digits than its factorization.

13320203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59105 (or 59102 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 13320203121 its reverse (12130202331), we get a palindrome (25450405452).

The spelling of 13320203121 in words is "thirteen billion, three hundred twenty million, two hundred three thousand, one hundred twenty-one".