212202222112221 has 16 divisors (see below), whose sum is σ = 311713795222848. Its totient is φ = 127334066672000.

The previous prime is 212202222112207. The next prime is 212202222112229. The reversal of 212202222112221 is 122211222202212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212202222112221 - 2⁵ = 212202222112189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212202222112191 and 212202222112200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212202222112229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31833513336 + ... + 31833520001.

It is an arithmetic number, because the mean of its divisors is an integer number (19482112201428).

Almost surely, 2^{212202222112221} is an apocalyptic number.

It is an amenable number.

212202222112221 is a deficient number, since it is larger than the sum of its proper divisors (99511573110627).

212202222112221 is a wasteful number, since it uses less digits than its factorization.

212202222112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63667033452.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 212202222112221 its reverse (122211222202212), we get a palindrome (334413444314433).

The spelling of 212202222112221 in words is "two hundred twelve trillion, two hundred two billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twenty-one".