221002222 has 16 divisors (see below), whose sum is σ = 379566720. Its totient is φ = 94538808.

The previous prime is 221002211. The next prime is 221002231. The reversal of 221002222 is 222200122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6772 + ... + 22087.

It is an arithmetic number, because the mean of its divisors is an integer number (23722920).

Almost surely, 2^221002222 is an apocalyptic number.

221002222 is a deficient number, since it is larger than the sum of its proper divisors (158564498).

221002222 is a wasteful number, since it uses less digits than its factorization.

221002222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29415.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 221002222 is about 14866.1434810781. The cubic root of 221002222 is about 604.5963858519.

Adding to 221002222 its reverse (222200122), we get a palindrome (443202344).

The spelling of 221002222 in words is "two hundred twenty-one million, two thousand, two hundred twenty-two".