221122220222 has 4 divisors (see below), whose sum is σ = 331683330336. Its totient is φ = 110561110110.

The previous prime is 221122220197. The next prime is 221122220269. The reversal of 221122220222 is 222022221122.

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 = 221122220194 and 221122220203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55280555054 + ... + 55280555057.

It is an arithmetic number, because the mean of its divisors is an integer number (82920832584).

Almost surely, 2^221122220222 is an apocalyptic number.

221122220222 is a deficient number, since it is larger than the sum of its proper divisors (110561110114).

221122220222 is a wasteful number, since it uses less digits than its factorization.

221122220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110561110113.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 221122220222 its reverse (222022221122), we get a palindrome (443144441344).

The spelling of 221122220222 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, two hundred twenty-two".