21066221002 has 8 divisors (see below), whose sum is σ = 31599957312. Its totient is φ = 10532901900.

The previous prime is 21066220999. The next prime is 21066221021. The reversal of 21066221002 is 20012266012.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109977 + ... + 232867.

It is an arithmetic number, because the mean of its divisors is an integer number (3949994664).

Almost surely, 2^21066221002 is an apocalyptic number.

21066221002 is a deficient number, since it is larger than the sum of its proper divisors (10533736310).

21066221002 is a wasteful number, since it uses less digits than its factorization.

21066221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208604.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21066221002 its reverse (20012266012), we get a palindrome (41078487014).

The spelling of 21066221002 in words is "twenty-one billion, sixty-six million, two hundred twenty-one thousand, two".