21210120000212 has 96 divisors (see below), whose sum is σ = 46126096531200. Its totient is φ = 8395813831680.

The previous prime is 21210120000161. The next prime is 21210120000233. The reversal of 21210120000212 is 21200002101212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10082087 + ... + 12002862.

It is an arithmetic number, because the mean of its divisors is an integer number (480480172200).

Almost surely, 2^{21210120000212} is an apocalyptic number.

21210120000212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21210120000212 is an abundant number, since it is smaller than the sum of its proper divisors (24915976530988).

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

21210120000212 is a wasteful number, since it uses less digits than its factorization.

21210120000212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22085073 (or 22085071 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21210120000212 its reverse (21200002101212), we get a palindrome (42410122101424).

The spelling of 21210120000212 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty million, two hundred twelve", and thus it is an aban number.