21210200112212 has 12 divisors (see below), whose sum is σ = 37117939631136. Its totient is φ = 10605074503320.

The previous prime is 21210200112187. The next prime is 21210200112259. The reversal of 21210200112212 is 21221100201212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4455614 + ... + 7891317.

It is an arithmetic number, because the mean of its divisors is an integer number (3093161635928).

Almost surely, 2^{21210200112212} is an apocalyptic number.

It is an amenable number.

21210200112212 is a deficient number, since it is larger than the sum of its proper divisors (15907739518924).

21210200112212 is a wasteful number, since it uses less digits than its factorization.

21210200112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12776398 (or 12776396 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21210200112212 its reverse (21221100201212), we get a palindrome (42431300313424).

The spelling of 21210200112212 in words is "twenty-one trillion, two hundred ten billion, two hundred million, one hundred twelve thousand, two hundred twelve".