21211000006 has 32 divisors (see below), whose sum is σ = 36595722240. Its totient is φ = 9032100000.

The previous prime is 21210999989. The next prime is 21211000073. The reversal of 21211000006 is 60000011212.

It is a self number, because there is not a number n which added to its sum of digits gives 21211000006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1535631 + ... + 1549381.

It is an arithmetic number, because the mean of its divisors is an integer number (1143616320).

Almost surely, 2^21211000006 is an apocalyptic number.

21211000006 is a deficient number, since it is larger than the sum of its proper divisors (15384722234).

21211000006 is a wasteful number, since it uses less digits than its factorization.

21211000006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14460.

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

Adding to 21211000006 its reverse (60000011212), we get a palindrome (81211011218).

The spelling of 21211000006 in words is "twenty-one billion, two hundred eleven million, six", and thus it is an aban number.