13350042521 has 4 divisors (see below), whose sum is σ = 13423799844. Its totient is φ = 13276285200.

The previous prime is 13350042493. The next prime is 13350042529. The reversal of 13350042521 is 12524005331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12524005331 = 49559 ⋅252709.

It can be written as a sum of positive squares in 2 ways, for example, as 1075840000 + 12274202521 = 32800^2 + 110789^2 .

It is a cyclic number.

It is not a de Polignac number, because 13350042521 - 2¹⁸ = 13349780377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13350042529) 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, 36878390 + ... + 36878751.

It is an arithmetic number, because the mean of its divisors is an integer number (3355949961).

Almost surely, 2^13350042521 is an apocalyptic number.

It is an amenable number.

13350042521 is a deficient number, since it is larger than the sum of its proper divisors (73757323).

13350042521 is an equidigital number, since it uses as much as digits as its factorization.

13350042521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73757322.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 13350042521 its reverse (12524005331), we get a palindrome (25874047852).

The spelling of 13350042521 in words is "thirteen billion, three hundred fifty million, forty-two thousand, five hundred twenty-one".