13203132021 has 6 divisors (see below), whose sum is σ = 19071190710. Its totient is φ = 8802088008.

The previous prime is 13203132017. The next prime is 13203132029. The reversal of 13203132021 is 12023130231.

13203132021 is a `hidden beast` number, since 1 + 320 + 3 + 1 + 320 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10152779121 + 3050352900 = 100761^2 + 55230^2 .

It is not a de Polignac number, because 13203132021 - 2² = 13203132017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13203131985 and 13203132003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13203132029) 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, 733507326 + ... + 733507343.

It is an arithmetic number, because the mean of its divisors is an integer number (3178531785).

Almost surely, 2^13203132021 is an apocalyptic number.

It is an amenable number.

13203132021 is a deficient number, since it is larger than the sum of its proper divisors (5868058689).

13203132021 is a wasteful number, since it uses less digits than its factorization.

13203132021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467014675 (or 1467014672 counting only the distinct ones).

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

Adding to 13203132021 its reverse (12023130231), we get a palindrome (25226262252).

The spelling of 13203132021 in words is "thirteen billion, two hundred three million, one hundred thirty-two thousand, twenty-one".