13521121355 has 32 divisors (see below), whose sum is σ = 19153305600. Its totient is φ = 8966972160.

The previous prime is 13521121331. The next prime is 13521121357. The reversal of 13521121355 is 55312112531.

It is not a de Polignac number, because 13521121355 - 2²⁶ = 13454012491 is a prime.

It is a super-3 number, since 3×13521121355³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (13521121357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2478671 + ... + 2484119.

It is an arithmetic number, because the mean of its divisors is an integer number (598540800).

Almost surely, 2^13521121355 is an apocalyptic number.

13521121355 is a deficient number, since it is larger than the sum of its proper divisors (5632184245).

13521121355 is a wasteful number, since it uses less digits than its factorization.

13521121355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7779.

The product of its digits is 4500, while the sum is 29.

Adding to 13521121355 its reverse (55312112531), we get a palindrome (68833233886).

The spelling of 13521121355 in words is "thirteen billion, five hundred twenty-one million, one hundred twenty-one thousand, three hundred fifty-five".