1221444112 has 40 divisors (see below), whose sum is σ = 2713237056. Its totient is φ = 521809536.

The previous prime is 1221444109. The next prime is 1221444151. The reversal of 1221444112 is 2114441221.

It is a nude number because it is divisible by every one of its digits.

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 in 7 ways as a sum of consecutive naturals, for example, 18303 + ... + 52705.

Almost surely, 2^1221444112 is an apocalyptic number.

It is an amenable number.

1221444112 is an abundant number, since it is smaller than the sum of its proper divisors (1491792944).

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

1221444112 is a wasteful number, since it uses less digits than its factorization.

1221444112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34735 (or 34729 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

The square root of 1221444112 is about 34949.1646824355. The cubic root of 1221444112 is about 1068.9511695368.

Adding to 1221444112 its reverse (2114441221), we get a palindrome (3335885333).

The spelling of 1221444112 in words is "one billion, two hundred twenty-one million, four hundred forty-four thousand, one hundred twelve".