13511105421 has 16 divisors (see below), whose sum is σ = 19847101248. Its totient is φ = 8107472000.

The previous prime is 13511105411. The next prime is 13511105431. The reversal of 13511105421 is 12450111531.

13511105421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13511105411) and next prime (13511105431).

It is not a de Polignac number, because 13511105421 - 2¹¹ = 13511103373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13511105391 and 13511105400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13511105411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2023536 + ... + 2030201.

It is an arithmetic number, because the mean of its divisors is an integer number (1240443828).

Almost surely, 2^13511105421 is an apocalyptic number.

13511105421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13511105421 is a deficient number, since it is larger than the sum of its proper divisors (6335995827).

13511105421 is a wasteful number, since it uses less digits than its factorization.

13511105421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4053852.

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 13511105421 its reverse (12450111531), we get a palindrome (25961216952).

It can be divided in two parts, 1351110 and 5421, that added together give a palindrome (1356531).

The spelling of 13511105421 in words is "thirteen billion, five hundred eleven million, one hundred five thousand, four hundred twenty-one".