13200354525521 has 4 divisors (see below), whose sum is σ = 13249426475700. Its totient is φ = 13151282575344.

The previous prime is 13200354525493. The next prime is 13200354525529. The reversal of 13200354525521 is 12552545300231.

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 4866965454400 + 8333389071121 = 2206120^2 + 2886761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13200354525521 is a prime.

It is a super-3 number, since 3×13200354525521³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13200354525529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24535974686 + ... + 24535975223.

It is an arithmetic number, because the mean of its divisors is an integer number (3312356618925).

Almost surely, 2^{13200354525521} is an apocalyptic number.

It is an amenable number.

13200354525521 is a deficient number, since it is larger than the sum of its proper divisors (49071950179).

13200354525521 is an equidigital number, since it uses as much as digits as its factorization.

13200354525521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49071950178.

The product of its (nonzero) digits is 180000, while the sum is 38.

Adding to 13200354525521 its reverse (12552545300231), we get a palindrome (25752899825752).

The spelling of 13200354525521 in words is "thirteen trillion, two hundred billion, three hundred fifty-four million, five hundred twenty-five thousand, five hundred twenty-one".