1223220412 has 24 divisors (see below), whose sum is σ = 2172090032. Its totient is φ = 602640000.

The previous prime is 1223220389. The next prime is 1223220451. The reversal of 1223220412 is 2140223221.

It is a self number, because there is not a number n which added to its sum of digits gives 1223220412.

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, 542287 + ... + 544537.

Almost surely, 2^1223220412 is an apocalyptic number.

It is an amenable number.

1223220412 is a deficient number, since it is larger than the sum of its proper divisors (948869620).

1223220412 is a wasteful number, since it uses less digits than its factorization.

1223220412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4189 (or 4187 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1223220412 is about 34974.5680745310. The cubic root of 1223220412 is about 1069.4690969766.

Adding to 1223220412 its reverse (2140223221), we get a palindrome (3363443633).

The spelling of 1223220412 in words is "one billion, two hundred twenty-three million, two hundred twenty thousand, four hundred twelve".