21210200001006 has 16 divisors (see below), whose sum is σ = 42432063614544. Its totient is φ = 7068122731584.

The previous prime is 21210200000959. The next prime is 21210200001071. The reversal of 21210200001006 is 60010000201212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485960215 + ... + 486003858.

It is an arithmetic number, because the mean of its divisors is an integer number (2652003975909).

Almost surely, 2^{21210200001006} is an apocalyptic number.

21210200001006 is an abundant number, since it is smaller than the sum of its proper divisors (21221863613538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21210200001006 is a wasteful number, since it uses less digits than its factorization.

21210200001006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971967715.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21210200001006 its reverse (60010000201212), we get a palindrome (81220200202218).

The spelling of 21210200001006 in words is "twenty-one trillion, two hundred ten billion, two hundred million, one thousand, six".