221011222 has 8 divisors (see below), whose sum is σ = 331758000. Its totient is φ = 110425224.

The previous prime is 221011201. The next prime is 221011243. The reversal of 221011222 is 222110122.

It is a happy number.

221011222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221011201) and next prime (221011243).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36697 + ... + 42292.

It is an arithmetic number, because the mean of its divisors is an integer number (41469750).

Almost surely, 2^221011222 is an apocalyptic number.

221011222 is a deficient number, since it is larger than the sum of its proper divisors (110746778).

221011222 is a wasteful number, since it uses less digits than its factorization.

221011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80390.

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

The square root of 221011222 is about 14866.4461792319. The cubic root of 221011222 is about 604.6045928487.

Adding to 221011222 its reverse (222110122), we get a palindrome (443121344).

The spelling of 221011222 in words is "two hundred twenty-one million, eleven thousand, two hundred twenty-two".