13521345021201 has 4 divisors (see below), whose sum is σ = 18028460028272. Its totient is φ = 9014230014132.

The previous prime is 13521345021187. The next prime is 13521345021257. The reversal of 13521345021201 is 10212054312531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13521345021201 - 2²³ = 13521336632593 is a prime.

It is a super-2 number, since 2×13521345021201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13521345061201) 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, 2253557503531 + ... + 2253557503536.

It is an arithmetic number, because the mean of its divisors is an integer number (4507115007068).

Almost surely, 2^{13521345021201} is an apocalyptic number.

It is an amenable number.

13521345021201 is a deficient number, since it is larger than the sum of its proper divisors (4507115007071).

13521345021201 is an equidigital number, since it uses as much as digits as its factorization.

13521345021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507115007070.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 13521345021201 its reverse (10212054312531), we get a palindrome (23733399333732).

The spelling of 13521345021201 in words is "thirteen trillion, five hundred twenty-one billion, three hundred forty-five million, twenty-one thousand, two hundred one".