13821103 has 8 divisors (see below), whose sum is σ = 14203728. Its totient is φ = 13441344.

The previous prime is 13821079. The next prime is 13821121. The reversal of 13821103 is 30112831.

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 13821103 - 2⁹ = 13820591 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13821503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12051 + ... + 13147.

It is an arithmetic number, because the mean of its divisors is an integer number (1775466).

Almost surely, 2^13821103 is an apocalyptic number.

13821103 is a deficient number, since it is larger than the sum of its proper divisors (382625).

13821103 is a wasteful number, since it uses less digits than its factorization.

13821103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 13821103 is about 3717.6744074757. The cubic root of 13821103 is about 239.9832337825.

Adding to 13821103 its reverse (30112831), we get a palindrome (43933934).

It can be divided in two parts, 13821 and 103, that added together give a square (13924 = 118²).

The spelling of 13821103 in words is "thirteen million, eight hundred twenty-one thousand, one hundred three".