1221110222 has 8 divisors (see below), whose sum is σ = 1833661200. Its totient is φ = 609889824.

The previous prime is 1221110161. The next prime is 1221110237. The reversal of 1221110222 is 2220111221.

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

It is a super-2 number, since 2×1221110222² = 2982220348545778568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221110197 and 1221110206.

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, 330347 + ... + 334022.

It is an arithmetic number, because the mean of its divisors is an integer number (229207650).

Almost surely, 2^1221110222 is an apocalyptic number.

1221110222 is a deficient number, since it is larger than the sum of its proper divisors (612550978).

1221110222 is an equidigital number, since it uses as much as digits as its factorization.

1221110222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665290.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1221110222 is about 34944.3875608087. The cubic root of 1221110222 is about 1068.8537589857.

Adding to 1221110222 its reverse (2220111221), we get a palindrome (3441221443).

Subtracting 1221110222 from its reverse (2220111221), we obtain a palindrome (999000999).

The spelling of 1221110222 in words is "one billion, two hundred twenty-one million, one hundred ten thousand, two hundred twenty-two".