210221222 has 4 divisors (see below), whose sum is σ = 315331836. Its totient is φ = 105110610.

The previous prime is 210221191. The next prime is 210221233. The reversal of 210221222 is 222122012.

210221222 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 junction number, because it is equal to n+sod(n) for n = 210221197 and 210221206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52555304 + ... + 52555307.

It is an arithmetic number, because the mean of its divisors is an integer number (78832959).

Almost surely, 2^210221222 is an apocalyptic number.

210221222 is a deficient number, since it is larger than the sum of its proper divisors (105110614).

210221222 is a wasteful number, since it uses less digits than its factorization.

210221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105110613.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 210221222 is about 14499.0076212133. The cubic root of 210221222 is about 594.6008404892.

Adding to 210221222 its reverse (222122012), we get a palindrome (432343234).

The spelling of 210221222 in words is "two hundred ten million, two hundred twenty-one thousand, two hundred twenty-two".