13521111051 has 16 divisors (see below), whose sum is σ = 20717435648. Its totient is φ = 7683660000.

The previous prime is 13521111031. The next prime is 13521111053. The reversal of 13521111051 is 15011112531.

13521111051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13521111051 - 2¹⁹ = 13520586763 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (13521111053) 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, 1774825 + ... + 1782426.

It is an arithmetic number, because the mean of its divisors is an integer number (1294839728).

Almost surely, 2^13521111051 is an apocalyptic number.

13521111051 is a deficient number, since it is larger than the sum of its proper divisors (7196324597).

13521111051 is a wasteful number, since it uses less digits than its factorization.

13521111051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3557442.

The product of its (nonzero) digits is 150, while the sum is 21.

Adding to 13521111051 its reverse (15011112531), we get a palindrome (28532223582).

The spelling of 13521111051 in words is "thirteen billion, five hundred twenty-one million, one hundred eleven thousand, fifty-one".