212022211 has 4 divisors (see below), whose sum is σ = 221240592. Its totient is φ = 202803832.

The previous prime is 212022191. The next prime is 212022227. The reversal of 212022211 is 112220212.

It is a happy number.

212022211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212022211 - 2¹¹ = 212020163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212022191 and 212022200.

It is not an unprimeable number, because it can be changed into a prime (212022241) 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, 4609156 + ... + 4609201.

It is an arithmetic number, because the mean of its divisors is an integer number (55310148).

Almost surely, 2^212022211 is an apocalyptic number.

212022211 is a deficient number, since it is larger than the sum of its proper divisors (9218381).

212022211 is an equidigital number, since it uses as much as digits as its factorization.

212022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9218380.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 212022211 is about 14560.9824874560. The cubic root of 212022211 is about 596.2940186698.

Adding to 212022211 its reverse (112220212), we get a palindrome (324242423).

The spelling of 212022211 in words is "two hundred twelve million, twenty-two thousand, two hundred eleven".