221000021212 has 12 divisors (see below), whose sum is σ = 388070005176. Its totient is φ = 110122876880.

The previous prime is 221000021201. The next prime is 221000021237. The reversal of 221000021212 is 212120000122.

It is a happy number.

221000021212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221000021192 and 221000021201.

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 in 3 ways as a sum of consecutive naturals, for example, 94282114 + ... + 94284457.

It is an arithmetic number, because the mean of its divisors is an integer number (32339167098).

Almost surely, 2^221000021212 is an apocalyptic number.

It is an amenable number.

221000021212 is a deficient number, since it is larger than the sum of its proper divisors (167069983964).

221000021212 is a wasteful number, since it uses less digits than its factorization.

221000021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188566868 (or 188566866 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221000021212 its reverse (212120000122), we get a palindrome (433120021334).

The spelling of 221000021212 in words is "two hundred twenty-one billion, twenty-one thousand, two hundred twelve".