210021321220212 has 12 divisors (see below), whose sum is σ = 490049749513856. Its totient is φ = 70007107073400.

The previous prime is 210021321220211. The next prime is 210021321220229. The reversal of 210021321220212 is 212022123120012.

210021321220212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021321220211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8750888384164 + ... + 8750888384187.

Almost surely, 2^{210021321220212} is an apocalyptic number.

It is an amenable number.

210021321220212 is an abundant number, since it is smaller than the sum of its proper divisors (280028428293644).

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

210021321220212 is a wasteful number, since it uses less digits than its factorization.

210021321220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17501776768358 (or 17501776768356 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 210021321220212 its reverse (212022123120012), we get a palindrome (422043444340224).

The spelling of 210021321220212 in words is "two hundred ten trillion, twenty-one billion, three hundred twenty-one million, two hundred twenty thousand, two hundred twelve".