201221110212 has 24 divisors (see below), whose sum is σ = 494227288800. Its totient is φ = 63543508416.

The previous prime is 201221110187. The next prime is 201221110247. The reversal of 201221110212 is 212011122102.

It is a junction number, because it is equal to n+sod(n) for n = 201221110191 and 201221110200.

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, 441274137 + ... + 441274592.

It is an arithmetic number, because the mean of its divisors is an integer number (20592803700).

Almost surely, 2^201221110212 is an apocalyptic number.

It is an amenable number.

201221110212 is an abundant number, since it is smaller than the sum of its proper divisors (293006178588).

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

201221110212 is a wasteful number, since it uses less digits than its factorization.

201221110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882548755 (or 882548753 counting only the distinct ones).

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

Adding to 201221110212 its reverse (212011122102), we get a palindrome (413232232314).

The spelling of 201221110212 in words is "two hundred one billion, two hundred twenty-one million, one hundred ten thousand, two hundred twelve".