13821102 has 72 divisors (see below), whose sum is σ = 33460128. Its totient is φ = 4106880.

The previous prime is 13821079. The next prime is 13821121. The reversal of 13821102 is 20112831.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 294043 + ... + 294089.

It is an arithmetic number, because the mean of its divisors is an integer number (464724).

Almost surely, 2^13821102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13821102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16730064).

13821102 is an abundant number, since it is smaller than the sum of its proper divisors (19639026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13821102 is a wasteful number, since it uses less digits than its factorization.

13821102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 13821102 is about 3717.6742729830. The cubic root of 13821102 is about 239.9832279946.

Adding to 13821102 its reverse (20112831), we get a palindrome (33933933).

The spelling of 13821102 in words is "thirteen million, eight hundred twenty-one thousand, one hundred two".