201220222212 has 18 divisors (see below), whose sum is σ = 508640006238. Its totient is φ = 67073407392.

The previous prime is 201220222211. The next prime is 201220222243. The reversal of 201220222212 is 212222022102.

201220222212 is a `hidden beast` number, since 201 + 220 + 22 + 221 + 2 = 666.

201220222212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 147751059456 + 53469162756 = 384384^2 + 231234^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (201220222211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2794725273 + ... + 2794725344.

Almost surely, 2^201220222212 is an apocalyptic number.

It is an amenable number.

201220222212 is an abundant number, since it is smaller than the sum of its proper divisors (307419784026).

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

201220222212 is a wasteful number, since it uses less digits than its factorization.

201220222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5589450627 (or 5589450622 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 201220222212 its reverse (212222022102), we get a palindrome (413442244314).

The spelling of 201220222212 in words is "two hundred one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred twelve".