1223320212 has 24 divisors (see below), whose sum is σ = 3171571200. Its totient is φ = 407773368.

The previous prime is 1223320211. The next prime is 1223320223. The reversal of 1223320212 is 2120233221.

1223320212 is a `hidden beast` number, since 122 + 332 + 0 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223320211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5663412 + ... + 5663627.

It is an arithmetic number, because the mean of its divisors is an integer number (132148800).

Almost surely, 2^1223320212 is an apocalyptic number.

1223320212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1223320212 is an abundant number, since it is smaller than the sum of its proper divisors (1948250988).

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

1223320212 is a wasteful number, since it uses less digits than its factorization.

1223320212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11327052 (or 11327044 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1223320212 is about 34975.9947964315. The cubic root of 1223320212 is about 1069.4981814360.

Adding to 1223320212 its reverse (2120233221), we get a palindrome (3343553433).

The spelling of 1223320212 in words is "one billion, two hundred twenty-three million, three hundred twenty thousand, two hundred twelve".