221200020212 has 12 divisors (see below), whose sum is σ = 387104115300. Its totient is φ = 110598844416.

The previous prime is 221200020193. The next prime is 221200020233. The reversal of 221200020212 is 212020002122.

It can be written as a sum of positive squares in 2 ways, for example, as 185109899536 + 36090120676 = 430244^2 + 189974^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 245414 + ... + 708962.

It is an arithmetic number, because the mean of its divisors is an integer number (32258676275).

Almost surely, 2^221200020212 is an apocalyptic number.

It is an amenable number.

221200020212 is a deficient number, since it is larger than the sum of its proper divisors (165904095088).

221200020212 is a wasteful number, since it uses less digits than its factorization.

221200020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582850 (or 582848 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221200020212 its reverse (212020002122), we get a palindrome (433220022334).

The spelling of 221200020212 in words is "two hundred twenty-one billion, two hundred million, twenty thousand, two hundred twelve".