1223222222 has 16 divisors (see below), whose sum is σ = 1862370144. Its totient is φ = 602448000.

The previous prime is 1223222219. The next prime is 1223222243. The reversal of 1223222222 is 2222223221.

1223222222 is a modest number, since divided by 22222 gives 12232 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1223222194 and 1223222203.

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, 184322 + ... + 190842.

It is an arithmetic number, because the mean of its divisors is an integer number (116398134).

Almost surely, 2^1223222222 is an apocalyptic number.

1223222222 is a deficient number, since it is larger than the sum of its proper divisors (639147922).

1223222222 is a wasteful number, since it uses less digits than its factorization.

1223222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7915.

The product of its digits is 768, while the sum is 20.

The square root of 1223222222 is about 34974.5939504664. The cubic root of 1223222222 is about 1069.4696244743.

Adding to 1223222222 its reverse (2222223221), we get a palindrome (3445445443).

Subtracting 1223222222 from its reverse (2222223221), we obtain a palindrome (999000999).

The spelling of 1223222222 in words is "one billion, two hundred twenty-three million, two hundred twenty-two thousand, two hundred twenty-two".