13521121343 has 16 divisors (see below), whose sum is σ = 14990754240. Its totient is φ = 12172365568.

The previous prime is 13521121331. The next prime is 13521121357. The reversal of 13521121343 is 34312112531.

It is not a de Polignac number, because 13521121343 - 2¹⁴ = 13521104959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13521121363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53171 + ... + 172827.

It is an arithmetic number, because the mean of its divisors is an integer number (936922140).

Almost surely, 2^13521121343 is an apocalyptic number.

13521121343 is a deficient number, since it is larger than the sum of its proper divisors (1469632897).

13521121343 is an equidigital number, since it uses as much as digits as its factorization.

13521121343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119731 (or 119697 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

Adding to 13521121343 its reverse (34312112531), we get a palindrome (47833233874).

The spelling of 13521121343 in words is "thirteen billion, five hundred twenty-one million, one hundred twenty-one thousand, three hundred forty-three".