21310106 has 8 divisors (see below), whose sum is σ = 32489364. Its totient is φ = 10480320.

The previous prime is 21310097. The next prime is 21310117. The reversal of 21310106 is 60101312.

It can be written as a sum of positive squares in 2 ways, for example, as 21298225 + 11881 = 4615^2 + 109^2 .

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

It is a Curzon number.

It is an unprimeable number.

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, 87215 + ... + 87458.

Almost surely, 2^21310106 is an apocalyptic number.

21310106 is a deficient number, since it is larger than the sum of its proper divisors (11179258).

21310106 is a wasteful number, since it uses less digits than its factorization.

21310106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174736.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 21310106 is about 4616.2870361363. The cubic root of 21310106 is about 277.2438173534.

Adding to 21310106 its reverse (60101312), we get a palindrome (81411418).

The spelling of 21310106 in words is "twenty-one million, three hundred ten thousand, one hundred six".