1221333112 has 8 divisors (see below), whose sum is σ = 2289999600. Its totient is φ = 610666552.

The previous prime is 1221333073. The next prime is 1221333121. The reversal of 1221333112 is 2113331221.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1221333112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76333312 + ... + 76333327.

It is an arithmetic number, because the mean of its divisors is an integer number (286249950).

Almost surely, 2^1221333112 is an apocalyptic number.

It is an amenable number.

1221333112 is a deficient number, since it is larger than the sum of its proper divisors (1068666488).

1221333112 is a wasteful number, since it uses less digits than its factorization.

1221333112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152666645 (or 152666641 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 1221333112 is about 34947.5766255688. The cubic root of 1221333112 is about 1068.9187878740.

Adding to 1221333112 its reverse (2113331221), we get a palindrome (3334664333).

The spelling of 1221333112 in words is "one billion, two hundred twenty-one million, three hundred thirty-three thousand, one hundred twelve".