221211211222 has 8 divisors (see below), whose sum is σ = 332533485216. Its totient is φ = 110366716152.

The previous prime is 221211211129. The next prime is 221211211321. The reversal of 221211211222 is 222112112122.

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

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 221211211222.

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, 119443573 + ... + 119445424.

It is an arithmetic number, because the mean of its divisors is an integer number (41566685652).

Almost surely, 2^221211211222 is an apocalyptic number.

221211211222 is a deficient number, since it is larger than the sum of its proper divisors (111322273994).

221211211222 is a wasteful number, since it uses less digits than its factorization.

221211211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238889462.

The product of its digits is 128, while the sum is 19.

Adding to 221211211222 its reverse (222112112122), we get a palindrome (443323323344).

The spelling of 221211211222 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-two".