221222033012 has 6 divisors (see below), whose sum is σ = 387138557778. Its totient is φ = 110611016504.

The previous prime is 221222032991. The next prime is 221222033029. The reversal of 221222033012 is 210330222122.

It is a happy number.

221222033012 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., 204445048336 + 16776984676 = 452156^2 + 129526^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 27652754123 + ... + 27652754130.

It is an arithmetic number, because the mean of its divisors is an integer number (64523092963).

Almost surely, 2^221222033012 is an apocalyptic number.

It is an amenable number.

221222033012 is a deficient number, since it is larger than the sum of its proper divisors (165916524766).

221222033012 is a wasteful number, since it uses less digits than its factorization.

221222033012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55305508257 (or 55305508255 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 221222033012 its reverse (210330222122), we get a palindrome (431552255134).

The spelling of 221222033012 in words is "two hundred twenty-one billion, two hundred twenty-two million, thirty-three thousand, twelve".