21110602 has 4 divisors (see below), whose sum is σ = 31665906. Its totient is φ = 10555300.

The previous prime is 21110591. The next prime is 21110611. The reversal of 21110602 is 20601112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13039321 + 8071281 = 3611^2 + 2841^2 .

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 as a sum of consecutive naturals, namely, 5277649 + ... + 5277652.

Almost surely, 2^21110602 is an apocalyptic number.

21110602 is a deficient number, since it is larger than the sum of its proper divisors (10555304).

21110602 is a wasteful number, since it uses less digits than its factorization.

21110602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10555303.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 21110602 is about 4594.6275148264. The cubic root of 21110602 is about 276.3759230181.

Adding to 21110602 its reverse (20601112), we get a palindrome (41711714).

It can be divided in two parts, 21110 and 602, that added together give a palindrome (21712).

The spelling of 21110602 in words is "twenty-one million, one hundred ten thousand, six hundred two".