21136103 has 8 divisors (see below), whose sum is σ = 22142976. Its totient is φ = 20136600.

The previous prime is 21136069. The next prime is 21136123. The reversal of 21136103 is 30163112.

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 21136103 - 2⁶ = 21136039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21136123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4538 + ... + 7928.

It is an arithmetic number, because the mean of its divisors is an integer number (2767872).

Almost surely, 2^21136103 is an apocalyptic number.

21136103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21136103 is a deficient number, since it is larger than the sum of its proper divisors (1006873).

21136103 is a wasteful number, since it uses less digits than its factorization.

21136103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3685.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 21136103 is about 4597.4017662153. The cubic root of 21136103 is about 276.4871629604.

Adding to 21136103 its reverse (30163112), we get a palindrome (51299215).

The spelling of 21136103 in words is "twenty-one million, one hundred thirty-six thousand, one hundred three".