13203230121 has 20 divisors (see below), whose sum is σ = 19762930000. Its totient is φ = 8784486936.

The previous prime is 13203230111. The next prime is 13203230129. The reversal of 13203230121 is 12103230231.

13203230121 is a `hidden beast` number, since 1 + 320 + 323 + 0 + 1 + 21 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-13203230121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13203230094 and 13203230103.

It is not an unprimeable number, because it can be changed into a prime (13203230129) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 122911 + ... + 203748.

It is an arithmetic number, because the mean of its divisors is an integer number (988146500).

Almost surely, 2^13203230121 is an apocalyptic number.

It is an amenable number.

13203230121 is a deficient number, since it is larger than the sum of its proper divisors (6559699879).

13203230121 is an equidigital number, since it uses as much as digits as its factorization.

13203230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327170 (or 327161 counting only the distinct ones).

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

Adding to 13203230121 its reverse (12103230231), we get a palindrome (25306460352).

The spelling of 13203230121 in words is "thirteen billion, two hundred three million, two hundred thirty thousand, one hundred twenty-one".