210021220212 has 48 divisors (see below), whose sum is σ = 490829509632. Its totient is φ = 69895743840.

The previous prime is 210021220193. The next prime is 210021220229. The reversal of 210021220212 is 212022120012.

It is a junction number, because it is equal to n+sod(n) for n = 210021220191 and 210021220200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21902083 + ... + 21911669.

It is an arithmetic number, because the mean of its divisors is an integer number (10225614784).

Almost surely, 2^210021220212 is an apocalyptic number.

It is an amenable number.

210021220212 is an abundant number, since it is smaller than the sum of its proper divisors (280808289420).

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

210021220212 is a wasteful number, since it uses less digits than its factorization.

210021220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12308 (or 12306 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 210021220212 its reverse (212022120012), we get a palindrome (422043340224).

The spelling of 210021220212 in words is "two hundred ten billion, twenty-one million, two hundred twenty thousand, two hundred twelve".