21010065602 has 8 divisors (see below), whose sum is σ = 31543988112. Its totient is φ = 10495402900.

The previous prime is 21010065547. The next prime is 21010065619. The reversal of 21010065602 is 20656001012.

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

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, 4812224 + ... + 4816587.

It is an arithmetic number, because the mean of its divisors is an integer number (3942998514).

Almost surely, 2^21010065602 is an apocalyptic number.

21010065602 is a deficient number, since it is larger than the sum of its proper divisors (10533922510).

21010065602 is a wasteful number, since it uses less digits than its factorization.

21010065602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9629904.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 21010065602 its reverse (20656001012), we get a palindrome (41666066614).

The spelling of 21010065602 in words is "twenty-one billion, ten million, sixty-five thousand, six hundred two".