212022303221 has 4 divisors (see below), whose sum is σ = 212097947232. Its totient is φ = 211946659212.

The previous prime is 212022303197. The next prime is 212022303257. The reversal of 212022303221 is 122303220212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212022303221 - 2²⁶ = 211955194357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212022303193 and 212022303202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212022303421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37817801 + ... + 37823406.

It is an arithmetic number, because the mean of its divisors is an integer number (53024486808).

Almost surely, 2^212022303221 is an apocalyptic number.

It is an amenable number.

212022303221 is a deficient number, since it is larger than the sum of its proper divisors (75644011).

212022303221 is an equidigital number, since it uses as much as digits as its factorization.

212022303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75644010.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 212022303221 its reverse (122303220212), we get a palindrome (334325523433).

The spelling of 212022303221 in words is "two hundred twelve billion, twenty-two million, three hundred three thousand, two hundred twenty-one".