221022022212 has 72 divisors (see below), whose sum is σ = 583197189120. Its totient is φ = 70496300160.

The previous prime is 221022022129. The next prime is 221022022213. The reversal of 221022022212 is 212220220122.

221022022212 is a `hidden beast` number, since 2 + 210 + 220 + 22 + 212 = 666.

221022022212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (221022022213) 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 23 ways as a sum of consecutive naturals, for example, 1013308 + ... + 1211955.

It is an arithmetic number, because the mean of its divisors is an integer number (8099960960).

Almost surely, 2^221022022212 is an apocalyptic number.

It is an amenable number.

221022022212 is an abundant number, since it is smaller than the sum of its proper divisors (362175166908).

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

221022022212 is a wasteful number, since it uses less digits than its factorization.

221022022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225393 (or 2225388 counting only the distinct ones).

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

Adding to 221022022212 its reverse (212220220122), we get a palindrome (433242242334).

The spelling of 221022022212 in words is "two hundred twenty-one billion, twenty-two million, twenty-two thousand, two hundred twelve".