1223121412 has 24 divisors (see below), whose sum is σ = 2192652000. Its totient is φ = 596680896.

The previous prime is 1223121397. The next prime is 1223121421. The reversal of 1223121412 is 2141213221.

It is a self number, because there is not a number n which added to its sum of digits gives 1223121412.

It is an unprimeable number.

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, 177039 + ... + 183817.

It is an arithmetic number, because the mean of its divisors is an integer number (91360500).

Almost surely, 2^1223121412 is an apocalyptic number.

It is an amenable number.

1223121412 is a deficient number, since it is larger than the sum of its proper divisors (969530588).

1223121412 is a wasteful number, since it uses less digits than its factorization.

1223121412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7875 (or 7873 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 1223121412 is about 34973.1527317741. The cubic root of 1223121412 is about 1069.4402440961.

Adding to 1223121412 its reverse (2141213221), we get a palindrome (3364334633).

The spelling of 1223121412 in words is "one billion, two hundred twenty-three million, one hundred twenty-one thousand, four hundred twelve".