21317102 has 8 divisors (see below), whose sum is σ = 32335200. Its totient is φ = 10538704.

The previous prime is 21317083. The next prime is 21317129. The reversal of 21317102 is 20171312.

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

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 3 ways as a sum of consecutive naturals, for example, 59702 + ... + 60057.

It is an arithmetic number, because the mean of its divisors is an integer number (4041900).

Almost surely, 2^21317102 is an apocalyptic number.

21317102 is a deficient number, since it is larger than the sum of its proper divisors (11018098).

21317102 is a wasteful number, since it uses less digits than its factorization.

21317102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119850.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 21317102 is about 4617.0447257959. The cubic root of 21317102 is about 277.2741532815.

Adding to 21317102 its reverse (20171312), we get a palindrome (41488414).

The spelling of 21317102 in words is "twenty-one million, three hundred seventeen thousand, one hundred two".