201221120212 has 12 divisors (see below), whose sum is σ = 402442240480. Its totient is φ = 86237622936.

The previous prime is 201221120201. The next prime is 201221120239. The reversal of 201221120212 is 212021122102.

It is a happy number.

201221120212 is an admirable number.

It is a super-3 number, since 3×201221120212³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3593234262 + ... + 3593234317.

Almost surely, 2^201221120212 is an apocalyptic number.

It is an amenable number.

201221120212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

201221120212 is a wasteful number, since it uses less digits than its factorization.

201221120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7186468590 (or 7186468588 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201221120212 its reverse (212021122102), we get a palindrome (413242242314).

The spelling of 201221120212 in words is "two hundred one billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twelve".