13521111211 has 8 divisors (see below), whose sum is σ = 14357498400. Its totient is φ = 12689282688.

The previous prime is 13521111209. The next prime is 13521111239. The reversal of 13521111211 is 11211112531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13521111211 - 2¹ = 13521111209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13521111281) 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 7 ways as a sum of consecutive naturals, for example, 1133551 + ... + 1145416.

It is an arithmetic number, because the mean of its divisors is an integer number (1794687300).

Almost surely, 2^13521111211 is an apocalyptic number.

13521111211 is a deficient number, since it is larger than the sum of its proper divisors (836387189).

13521111211 is a wasteful number, since it uses less digits than its factorization.

13521111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279333.

The product of its digits is 60, while the sum is 19.

Adding to 13521111211 its reverse (11211112531), we get a palindrome (24732223742).

The spelling of 13521111211 in words is "thirteen billion, five hundred twenty-one million, one hundred eleven thousand, two hundred eleven".