221211220222 has 4 divisors (see below), whose sum is σ = 331816830336. Its totient is φ = 110605610110.

The previous prime is 221211220213. The next prime is 221211220247. The reversal of 221211220222 is 222022112122.

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

It is a self number, because there is not a number n which added to its sum of digits gives 221211220222.

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, 55302805054 + ... + 55302805057.

It is an arithmetic number, because the mean of its divisors is an integer number (82954207584).

Almost surely, 2^221211220222 is an apocalyptic number.

221211220222 is a deficient number, since it is larger than the sum of its proper divisors (110605610114).

221211220222 is a wasteful number, since it uses less digits than its factorization.

221211220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110605610113.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221211220222 its reverse (222022112122), we get a palindrome (443233332344).

The spelling of 221211220222 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty-two".