212102022221 has 8 divisors (see below), whose sum is σ = 214519492800. Its totient is φ = 209685314080.

The previous prime is 212102022199. The next prime is 212102022229. The reversal of 212102022221 is 122220201212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212102022221 - 2²² = 212097827917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212102022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102022229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378566 + ... + 753336.

It is an arithmetic number, because the mean of its divisors is an integer number (26814936600).

Almost surely, 2^212102022221 is an apocalyptic number.

It is an amenable number.

212102022221 is a deficient number, since it is larger than the sum of its proper divisors (2417470579).

212102022221 is an equidigital number, since it uses as much as digits as its factorization.

212102022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381219.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212102022221 its reverse (122220201212), we get a palindrome (334322223433).

The spelling of 212102022221 in words is "two hundred twelve billion, one hundred two million, twenty-two thousand, two hundred twenty-one".