21060106 has 8 divisors (see below), whose sum is σ = 31619844. Its totient is φ = 10520160.

The previous prime is 21060097. The next prime is 21060131. The reversal of 21060106 is 60106012.

It can be written as a sum of positive squares in 2 ways, for example, as 20784481 + 275625 = 4559^2 + 525^2 .

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

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 21060106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1915 + ... + 6766.

Almost surely, 2^21060106 is an apocalyptic number.

21060106 is a deficient number, since it is larger than the sum of its proper divisors (10559738).

21060106 is a wasteful number, since it uses less digits than its factorization.

21060106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9896.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 21060106 is about 4589.1291112803. The cubic root of 21060106 is about 276.1553857925.

Adding to 21060106 its reverse (60106012), we get a palindrome (81166118).

It can be divided in two parts, 2 and 1060106, that multiplied together give a palindrome (2120212).

The spelling of 21060106 in words is "twenty-one million, sixty thousand, one hundred six".