1222120312 has 64 divisors (see below), whose sum is σ = 2661580800. Its totient is φ = 515289600.

The previous prime is 1222120309. The next prime is 1222120313. The reversal of 1222120312 is 2130212221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222120313) 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 15 ways as a sum of consecutive naturals, for example, 954889 + ... + 956167.

It is an arithmetic number, because the mean of its divisors is an integer number (41587200).

Almost surely, 2^1222120312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222120312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330790400).

1222120312 is an abundant number, since it is smaller than the sum of its proper divisors (1439460488).

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

1222120312 is a wasteful number, since it uses less digits than its factorization.

1222120312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1222120312 is about 34958.8373948563. The cubic root of 1222120312 is about 1069.1483927602.

Adding to 1222120312 its reverse (2130212221), we get a palindrome (3352332533).

The spelling of 1222120312 in words is "one billion, two hundred twenty-two million, one hundred twenty thousand, three hundred twelve".