212220022221 has 16 divisors (see below), whose sum is σ = 314416555200. Its totient is φ = 141472579824.

The previous prime is 212220022129. The next prime is 212220022237. The reversal of 212220022221 is 122220022212.

212220022221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212220022221 - 2¹⁰ = 212220021197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212220022194 and 212220022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212220022271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343390 + ... + 736448.

It is an arithmetic number, because the mean of its divisors is an integer number (19651034700).

Almost surely, 2^212220022221 is an apocalyptic number.

It is an amenable number.

212220022221 is a deficient number, since it is larger than the sum of its proper divisors (102196532979).

212220022221 is a wasteful number, since it uses less digits than its factorization.

212220022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413065 (or 413059 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 212220022221 its reverse (122220022212), we get a palindrome (334440044433).

Subtracting from 212220022221 its reverse (122220022212), we obtain a palindrome (90000000009).

The spelling of 212220022221 in words is "two hundred twelve billion, two hundred twenty million, twenty-two thousand, two hundred twenty-one".