21103102 has 8 divisors (see below), whose sum is σ = 31674312. Its totient is φ = 10545000.

The previous prime is 21103087. The next prime is 21103109. The reversal of 21103102 is 20130112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103109) 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 3 ways as a sum of consecutive naturals, for example, 3852 + ... + 7552.

It is an arithmetic number, because the mean of its divisors is an integer number (3959289).

Almost surely, 2^21103102 is an apocalyptic number.

21103102 is a deficient number, since it is larger than the sum of its proper divisors (10571210).

21103102 is a wasteful number, since it uses less digits than its factorization.

21103102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6554.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 21103102 is about 4593.8112717002. The cubic root of 21103102 is about 276.3431896243.

Adding to 21103102 its reverse (20130112), we get a palindrome (41233214).

The spelling of 21103102 in words is "twenty-one million, one hundred three thousand, one hundred two".