221000111212 has 48 divisors (see below), whose sum is σ = 392889118720. Its totient is φ = 108763300800.

The previous prime is 221000111083. The next prime is 221000111221. The reversal of 221000111212 is 212111000122.

221000111212 is digitally balanced in base 3, 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 = 221000111192 and 221000111201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35476114 + ... + 35482342.

Almost surely, 2^221000111212 is an apocalyptic number.

It is an amenable number.

221000111212 is a deficient number, since it is larger than the sum of its proper divisors (171889007508).

221000111212 is a wasteful number, since it uses less digits than its factorization.

221000111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6902 (or 6900 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221000111212 its reverse (212111000122), we get a palindrome (433111111334).

The spelling of 221000111212 in words is "two hundred twenty-one billion, one hundred eleven thousand, two hundred twelve".