210101221212 has 24 divisors (see below), whose sum is σ = 490243594512. Its totient is φ = 70032681600.

The previous prime is 210101221207. The next prime is 210101221243. The reversal of 210101221212 is 212122101012.

It is a junction number, because it is equal to n+sod(n) for n = 210101221191 and 210101221200.

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, 1485912 + ... + 1621152.

It is an arithmetic number, because the mean of its divisors is an integer number (20426816438).

Almost surely, 2^210101221212 is an apocalyptic number.

It is an amenable number.

210101221212 is an abundant number, since it is smaller than the sum of its proper divisors (280142373300).

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

210101221212 is a wasteful number, since it uses less digits than its factorization.

210101221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264709 (or 264707 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210101221212 its reverse (212122101012), we get a palindrome (422223322224).

It can be divided in two parts, 2101012 and 21212, that multiplied together give a palindrome (44566666544).

The spelling of 210101221212 in words is "two hundred ten billion, one hundred one million, two hundred twenty-one thousand, two hundred twelve".