13203023121 has 6 divisors (see below), whose sum is σ = 19071033410. Its totient is φ = 8802015408.

The previous prime is 13203023087. The next prime is 13203023129. The reversal of 13203023121 is 12132030231.

13203023121 is a `hidden beast` number, since 1 + 320 + 30 + 2 + 312 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13072720896 + 130302225 = 114336^2 + 11415^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13203023121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13203023094 and 13203023103.

It is not an unprimeable number, because it can be changed into a prime (13203023129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 733501276 + ... + 733501293.

Almost surely, 2^13203023121 is an apocalyptic number.

It is an amenable number.

13203023121 is a deficient number, since it is larger than the sum of its proper divisors (5868010289).

13203023121 is a wasteful number, since it uses less digits than its factorization.

13203023121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467002575 (or 1467002572 counting only the distinct ones).

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

Adding to 13203023121 its reverse (12132030231), we get a palindrome (25335053352).

The spelling of 13203023121 in words is "thirteen billion, two hundred three million, twenty-three thousand, one hundred twenty-one".