1223220012 has 24 divisors (see below), whose sum is σ = 3261920256. Its totient is φ = 349491408.

The previous prime is 1223219999. The next prime is 1223220043. The reversal of 1223220012 is 2100223221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1223219973 and 1223220000.

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, 7280988 + ... + 7281155.

It is an arithmetic number, because the mean of its divisors is an integer number (135913344).

Almost surely, 2^1223220012 is an apocalyptic number.

1223220012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1223220012 is an abundant number, since it is smaller than the sum of its proper divisors (2038700244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223220012 is a wasteful number, since it uses less digits than its factorization.

1223220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14562157 (or 14562155 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1223220012 is about 34974.5623560896. The cubic root of 1223220012 is about 1069.4689804024.

Adding to 1223220012 its reverse (2100223221), we get a palindrome (3323443233).

The spelling of 1223220012 in words is "one billion, two hundred twenty-three million, two hundred twenty thousand, twelve".