221222120012 has 24 divisors (see below), whose sum is σ = 405782393856. Its totient is φ = 105327425808.

The previous prime is 221222120003. The next prime is 221222120017. The reversal of 221222120012 is 210021222122.

It is a happy number.

221222120012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221222120017) 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 7 ways as a sum of consecutive naturals, for example, 5370938 + ... + 5411969.

It is an arithmetic number, because the mean of its divisors is an integer number (16907599744).

Almost surely, 2^221222120012 is an apocalyptic number.

It is an amenable number.

221222120012 is a deficient number, since it is larger than the sum of its proper divisors (184560273844).

221222120012 is a wasteful number, since it uses less digits than its factorization.

221222120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10783157 (or 10783155 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221222120012 its reverse (210021222122), we get a palindrome (431243342134).

The spelling of 221222120012 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, twelve".